All practice questions

13931 questions

All types13,931 Multiple choice7,139 True / False771 Numeric1,526 Matching2,583 Ordering631 Fill in the blank1,223 Short answer58

Question 13061Question →

In an expanding manufacturing enterprise, internal managerial economies of scale will continuously reduce average costs per unit regardless of how complex or deep the administrative hierarchy becomes.

True

False

Show answer & explanation

Answer: False

Answer

False

The statement is false because managerial economies of scale do not operate indefinitely. When a enterprise becomes overly large, multi-layered management leads to communication gaps, slow response times, and bureaucratic inefficiency. These managerial diseconomies increase long-run average cost per unit once the firm expands beyond its optimal output capacity.

Step-by-Step Solution

Define managerial economies of scale and their initial benefits.

Managerial economies occur when large-scale firms employ functional specialists (e.g., finance, marketing, personnel), boosting administrative efficiency.

Establishing how managerial division of labor functions is essential for assessing cost behavior.

Analyze the effect of over-expansion and increased organizational depth.

As the scale of production grows excessively, communication channels lengthen, decision-making becomes slow, and supervision costs increase.

Evaluating organizational complexity reveals the emergence of internal diseconomies of scale.

Determine the impact on long-run average cost and evaluate the statement.

Managerial inefficiencies push average costs upward once the optimum output scale is surpassed, making the claim of perpetual cost reduction false.

Connecting administrative friction to the upward sloping segment of the long-run average cost curve confirms the statement is false.

Key Concept

Limits of Internal Economies of Scale and Managerial Diseconomies

Question 13062Question →

A logging firm extracts raw timber worth $\text{₦}200,000$ and sells it to a sawmill. The sawmill processes the timber into wooden planks and sells them to a construction company for $\text{₦}350,000$ . What is the total value added contributed to Gross Domestic Product (GDP) by these two stages of production?

\text{₦}350,000

\text{₦}550,000

\text{₦}150,000

\text{₦}200,000

Show answer & explanation

Answer: $\text{₦}350,000$

Answer

The total value added contributed to GDP by the two stages of production is

\text{₦}350,000

Under the output (value added) method of national income measurement, GDP is calculated by summing the net value added at each stage of production. The logging firm adds

\text{₦}200,000

and the sawmill adds

\text{₦}150,000

(

\text{₦}350,000 - \text{₦}200,000

). Summing these gives a total contribution to GDP of

\text{₦}350,000

, which is also equivalent to the value of final output.

Step-by-Step Solution

Calculate the value added by the logging firm.

Value Added (Logging) =

\text{₦}200,000 - \text{₦}0 = \text{₦}200,000

The raw timber is harvested without prior purchased intermediate inputs, so its full sales value is value added.

Calculate the value added by the sawmill.

Value Added (Sawmill) =

\text{₦}350,000 - \text{₦}200,000 = \text{₦}150,000

Value added is computed by subtracting intermediate consumption (timber cost) from gross output value (planks sale price).

Sum the value added across both production stages.

Total Value Added =

\text{₦}200,000 + \text{₦}150,000 = \text{₦}350,000

The output method avoids double counting by summing only net value additions at each stage of production.

Key Concept

Output (Value Added) Method of Measuring National Income

Estimated Time:1m 0s

Question 13063Question →

Match each classical international trade concept on the left with its corresponding economic definition or condition on the right.

Click a left item, then click its matching right item

Show answer & explanation

Answer

Absolute Advantage pairs with producing a good using fewer real inputs or labor-hours per unit; Comparative Advantage pairs with producing a good at a lower relative sacrifice of an alternative commodity; Opportunity Cost pairs with the quantity of one good foregone to produce another; and Mutually Beneficial Terms of Trade pairs with an international price ratio set between domestic cost limits.

Absolute advantage evaluates efficiency in terms of direct resource inputs, whereas comparative advantage evaluates efficiency in terms of foregone alternative production. Opportunity cost represents the real commodity trade-off required, and mutually beneficial terms of trade must fall between the domestic opportunity cost limits of the participating countries.

Step-by-Step Solution

Identify the primary criterion for Absolute Advantage.

Absolute advantage focuses on absolute efficiency (fewer input resources or labor-hours needed).

Adam Smith defined absolute advantage through absolute input superiority.

Identify the primary criterion for Comparative Advantage.

Comparative advantage focuses on relative efficiency or lower opportunity cost.

David Ricardo showed that trade benefits depend on relative cost differentials rather than absolute superiority.

Define Opportunity Cost in trade theory.

It represents the trade-off ratio between two goods.

Gottfried Haberler reformulated comparative advantage using opportunity cost curves.

Determine the condition for mutually beneficial exchange.

The terms of trade exchange rate must be strictly bounded by the domestic cost ratios of both nations.

If terms of trade fall outside these bounds, at least one nation would be worse off trading than remaining self-sufficient.

Key Concept

Foundational Principles of International Trade Theories

Question 13064Question →

Match each mammalian sensory structure with its primary physiological function.

Click a left item, then click its matching right item

Show answer & explanation

Answer

Semicircular canals match with detection of posture and dynamic body balance; Organ of Corti matches with transduction of sound wave vibrations into nerve impulses; Fovea centralis matches with provision of maximum visual acuity and color perception; Olfactory epithelium matches with chemoreception of airborne volatile chemicals.

Each sensory structure matches its corresponding physiological process: the semicircular canals detect rotational acceleration for dynamic balance, the Organ of Corti translates fluid waves to nerve impulses for hearing, the fovea centralis yields maximum visual acuity via cone photoreceptors, and the olfactory epithelium detects airborne odorants through chemoreceptors.

Step-by-Step Solution

Differentiate between inner ear structures involved in equilibrium versus audition.

Semicircular canals govern dynamic equilibrium, whereas the Organ of Corti inside the cochlea serves as the organ of hearing.

The vestibular system senses movement and position, while the cochlear system processes sound frequency and amplitude.

Associate specialized retinal structures and specialized mucous membrane receptors with their functions.

The fovea centralis contains tightly packed cones responsible for sharp vision, while the olfactory epithelium contains chemoreceptors for smelling airborne chemicals.

Photoreceptors in the fovea require dense light focusing, while olfactory hair cells respond to chemical stimulants dissolved in mucus.

Key Concept

Structure and Function of Mammalian Sense Organs

Estimated Time:1m 0s

Question 13065Question →

A radioactive parent nucleus of Thorium, $^{232}_{90}\text{Th}$ , undergoes a natural radioactive decay series by emitting a total of $6$ $\alpha$ -particles and $4$ $\beta^-$ -particles to form a stable daughter isotope of Lead ( $\text{Pb}$ ). Calculate the number of neutrons present in the nucleus of the resulting daughter isotope.

Show answer & explanation

Answer: 126

Answer

The resulting daughter nucleus contains 126 neutrons.

Emitting

6

\alpha

-particles reduces the mass number by

6 \times 4 = 24

units and the atomic number by

6 \times 2 = 12

units. Emitting

4

\beta^-

-particles leaves the mass number unchanged while increasing the atomic number by

4 \times 1 = 4

units. Consequently, the daughter nucleus has a mass number

A = 232 - 24 = 208

and an atomic number

Z = 90 - 12 + 4 = 82

. The number of neutrons is

N = A - Z = 208 - 82 = 126

Step-by-Step Solution

Calculate the mass number (

A

) of the daughter nucleus after all emissions

A = 232 - (6 \times 4) = 208

An alpha particle carries away 4 mass units (

^{4}_{2}\text{He}

), while a beta-minus particle carries 0 mass units (

^{0}_{-1}\text{e}

Calculate the atomic number (

Z

) of the daughter nucleus after all emissions

Z = 90 - (6 \times 2) + (4 \times 1) = 82

Each alpha decay reduces nuclear charge by 2, and each beta-minus decay increases nuclear charge by 1 due to neutron-to-proton conversion.

Compute the number of neutrons (

N

)

N = A - Z = 208 - 82 = 126

The number of neutrons in any nuclide is given by subtracting the atomic number (protons) from the mass number (nucleons).

Key Concept

Mass and Atomic Number Conservation in Radioactive Decay Chains

Estimated Time:2m 0s

Question 13066Question →

Match each consumer action regarding a scale of preference on the left with its underlying economic significance on the right.

Click a left item, then click its matching right item

Show answer & explanation

Answer

The correct pairings match: arranging wants by urgency with establishing a framework for rational decision-making; selecting the top item with maximizing utility from limited income; forgoing the second item with incurring real opportunity cost; and re-ordering items during price changes with adjusting priority to reflect budget constraints.

Constructing a scale of preference enables consumers to make rational economic choices. The item placed at the top yields highest satisfaction, while the second-ranked item left unpurchased constitutes the real opportunity cost of the selection. Shifts in market prices require adjusting priority ordering to remain within budget limits.

Step-by-Step Solution

Analyze the purpose of listing wants in descending order of importance.

Pairs with establishing a framework for rational decision-making under scarcity.

Scale of preference organizes subjective human wants so that limited means are applied systematically to pressing needs.

Determine the outcome of fulfilling the top item on the preference schedule.

Pairs with maximizing total utility from limited monetary income.

A rational consumer allocates income to the most urgent item first to attain maximum total satisfaction.

Identify the economic concept associated with the second item on the scale that remains unfulfilled.

Pairs with incurring the real opportunity cost of the choice made.

Opportunity cost is defined as the next best alternative sacrificed, which is the second item on a scale of preference.

Examine how relative price variations impact consumer preference rankings.

Pairs with adjusting consumer priority to reflect modified budget constraints.

When price changes affect affordability, rational consumers re-evaluate their list of wants to optimize expenditure within budget limitations.

Key Concept

Scale of Preference and Opportunity Cost

Estimated Time:1m 30s

Question 13067Question →

In the evolutionary transition of plants from aquatic and moist habitats to dry land, which structural adaptation first enabled pteridophytes to overcome the height limitations of bryophytes by facilitating long-distance transport and mechanical support?

The differentiation of true vascular tissues containing lignified xylem and phloem

The development of non-vascular rhizoids for water absorption in bryophytes

The formation of naked seeds enclosed within protective floral ovaries in gymnosperms

The complete separation of fluids in a three-chambered internal transport organ

Show answer & explanation

Answer: The differentiation of true vascular tissues containing lignified xylem and phloem

Answer

The differentiation of true vascular tissues containing lignified xylem and phloem

The development of specialized conducting tissues (lignified xylem for water and mechanical strength, plus phloem for organic nutrients) represents the main evolutionary milestone that enabled pteridophytes and higher vascular plants to grow tall on land.

Step-by-Step Solution

Analyze the evolutionary limitation of bryophytes (mosses and liverworts).

Bryophytes lack true vascular bundles and rely on simple diffusion across short distances, keeping them small and restricted to moist habitats.

Without specialized conducting cells, water transport is constrained by physical diffusion limits.

Identify the key evolutionary advance in pteridophytes (ferns).

Pteridophytes were the first plant group to develop true vascular tissues (xylem and phloem).

Lignified xylem vessels provide compressive strength for vertical support as well as efficient water transport over tall distances.

Key Concept

Evolution of plant vascular systems and land adaptation trends

Estimated Time:1m 0s

Question 13068Question →

A sharp rise in the market price of gas cookers causes a decrease in the demand for liquefied petroleum gas (LPG) and an increase in the demand for electric hobs. Which of the following correctly classifies the demand for LPG and electric hobs relative to gas cookers?

Joint demand and competitive demand

Competitive demand and joint demand

Derived demand and composite demand

Composite demand and derived demand

Show answer & explanation

Answer: Joint demand and competitive demand

Answer

Joint demand and competitive demand

Liquefied petroleum gas (LPG) is required to operate a gas cooker, so they are consumed jointly to satisfy one economic want (cooking). When gas cookers become more expensive, fewer are demanded, leading to a decrease in the demand for LPG (joint demand). Conversely, electric hobs serve as a direct substitute for gas cookers. An increase in the price of gas cookers causes consumers to shift towards electric hobs, increasing their demand (competitive demand).

Step-by-Step Solution

Analyze the relationship between gas cookers and LPG

Since a price increase in gas cookers reduces the demand for LPG, the two goods are consumed together.

Goods that are used jointly to satisfy a single want exhibit complementary or joint demand.

Analyze the relationship between gas cookers and electric hobs

Since a price increase in gas cookers increases the demand for electric hobs, consumers are substituting gas cookers with electric hobs.

Goods that serve as direct alternatives to one another exhibit competitive demand.

Synthesize the classifications

LPG exhibits joint demand, while electric hobs exhibit competitive demand relative to gas cookers.

Combining the results yields the correct ordered classification pair.

Key Concept

Interrelated Types of Demand (Joint vs Competitive Demand)

Estimated Time:1m 30s

Question 13069Question →

In an industrial manufacturing zone, Unit 1 synthesizes tetraoxosulfate(VI) acid ( $\text{H}_2\text{SO}_4$ ) continuously in high tonnage for agricultural fertilizer plants, whereas Unit 2 produces specialized food flavorings in small batch reactors with high purity standards. Which of the following statements correctly classifies the chemical products of Unit 1 and Unit 2?

Unit 1 produces a heavy chemical, whereas Unit 2 produces a fine chemical.

Unit 1 produces a fine chemical, whereas Unit 2 produces a heavy chemical.

Both Unit 1 and Unit 2 produce heavy chemicals because both products are used industrially.

Both Unit 1 and Unit 2 produce fine chemicals because both require controlled chemical synthesis.

Show answer & explanation

Answer: Unit 1 produces a heavy chemical, whereas Unit 2 produces a fine chemical.

Answer

Unit 1 produces a heavy chemical, whereas Unit 2 produces a fine chemical.

Heavy chemicals like tetraoxosulfate(VI) acid are manufactured continuously on a large scale (bulk production) for wide industrial use. In contrast, fine chemicals such as food flavorings, pharmaceuticals, and dyes are produced in small batch quantities with high purity standards.

Step-by-Step Solution

Analyze the operational parameters of Unit 1.

Unit 1 produces tetraoxosulfate(VI) acid in large tonnage/bulk scale using a continuous process, which defines a heavy chemical.

Heavy chemicals are characterized by large-scale bulk production, continuous processing, and utility across major industrial sectors.

Analyze the operational parameters of Unit 2.

Unit 2 synthesizes food flavorings in small batch quantities under strict purity controls, which defines a fine chemical.

Fine chemicals are high-purity substances manufactured in small batches for specific applications like food additives, drugs, and dyes.

Match the classifications to select the correct statement.

Unit 1 corresponds to a heavy chemical and Unit 2 corresponds to a fine chemical.

This matches the distinct production scale and purity requirements of heavy versus fine chemicals.

Key Concept

Heavy Chemicals vs Fine Chemicals

Question 13070Question →

When a firm in a perfectly competitive market faces a market price equal to the minimum point of its short-run average variable cost ( $AVC$ ) curve, its total economic loss from producing the profit-maximizing output is identical to its total fixed cost ( $TFC$ ), making its short-run operational loss equal to the loss incurred by shutting down immediately.

True

False

Show answer & explanation

Answer: True

Answer

The statement is True.

The statement is true because at the short-run shutdown price (

P = \text{min } AVC

), total revenue (

TR

) exactly matches total variable cost (

TVC

). Subtracting total cost (

TC = TFC + TVC

) from total revenue leaves an economic loss equal to

-TFC

. Because shutting down entirely also yields an economic loss of

-TFC

, the financial loss is identical whether the firm operates or halts production.

Step-by-Step Solution

Formulate total revenue (

TR

) and total variable cost (

TVC

) at output

Q^*

where

P = \text{min } AVC

TR = P \times Q^*

and

TVC = AVC \times Q^*

. Since

P = AVC

TR = TVC

To evaluate whether revenue covers variable operating expenses at the short-run shutdown threshold.

Calculate total economic loss when the firm produces

Q^*

\text{Loss} = TC - TR = (TFC + TVC) - TVC = TFC.

Because

TR

offsets

TVC

completely, the net loss equals unrecovered fixed costs.

Calculate total economic loss when the firm shuts down (

Q = 0

\text{Loss} = TC - TR = (TFC + 0) - 0 = TFC.

At zero output, variable costs and revenues are zero, leaving fixed costs as the total loss.

Compare the economic losses under both choices.

\text{Loss when producing } (TFC) = \text{Loss when shut down } (TFC).

Demonstrates that operating at

P = \text{min } AVC

yields the exact same monetary loss as shutting down immediately.

Key Concept

Short-run shutdown decision and fixed cost loss equivalence in perfect competition

Question 13071Question →

On the AFEX Commodities Exchange in Nigeria, grain dealers contract to trade bulk maize where the price is agreed upon today, but physical delivery and payment take place three months in the future. Based on the timing of delivery, which type of market does this transaction represent?

Futures market

Spot market

Money market

Capital market

Show answer & explanation

Answer: Futures market

Answer

The transaction represents a futures market because contracts are executed for delivery and settlement at a specified future date.

Markets classified by the nature and timing of delivery fall into spot markets (immediate exchange) and futures markets (contracted for a future date). Because the contract specifies price today with settlement three months later, it is a classic futures market transaction.

Step-by-Step Solution

Analyze the timing of transaction and delivery in the stem scenario.

The price is negotiated immediately, but physical delivery and final settlement take place three months later.

Market classification by time or delivery tenure distinguishes immediate exchanges from deferred exchanges.

Match the transaction characteristics to standard market classifications.

Transactions involving price agreement today for future delivery represent futures (or forward) markets, whereas immediate cash and delivery represent spot markets.

This structural definition separates spot transactions from derivative/futures transactions.

Key Concept

Classification of Markets by Time of Delivery (Spot vs Futures Markets)

Question 13072Question →

A simple pendulum of fixed length $l$ carries a bob of mass $m$ and oscillates with a period $T$ . If the bob is replaced by another bob of mass $2m$ while maintaining the exact same string length, what is the new period of oscillation?

2T

T

\sqrt{2}T

\frac{T}{2}

Show answer & explanation

Answer: $T$

Answer

The new period of oscillation remains

T

The period of oscillation for a simple pendulum undergoing small displacement SHM is given by

T = 2\pi \sqrt{\frac{l}{g}}

. The mass of the bob

m

is not a parameter in this equation. Therefore, altering the mass while keeping length

l

constant leaves the period unchanged as

T

Step-by-Step Solution

Identify the governing equation for the period of a simple pendulum executing simple harmonic motion.

T = 2\pi \sqrt{\frac{l}{g}}

To analyze which physical parameters determine the period of the simple pendulum.

Check for mass dependence in the formula.

The mass variable

m

does not appear in

T = 2\pi \sqrt{\frac{l}{g}}

The restoring gravitational force and inertia both scale linearly with mass, causing mass to cancel out entirely.

Determine the period after doubling the mass at constant length.

The new period is equal to

T

Since length

l

and acceleration due to gravity

g

are constant, changing the mass from

m

2m

has no effect on period.

Key Concept

Independence of Simple Pendulum Period from Bob Mass

Question 13073Question →

An object of mass $m$ is projected vertically upwards from the surface of a spherical planet of radius $R$ and mass $M$ with an initial speed equal to half of the planet's escape velocity. Neglecting atmospheric friction, what maximum height above the planet's surface will the object reach?

\frac{R}{4}

\frac{R}{3}

\frac{R}{2}

R

Show answer & explanation

Answer: $\frac{R}{3}$

Answer

The maximum height above the planet's surface reached by the object is

\frac{R}{3}

By mechanical energy conservation, the initial total energy at launch equals the potential energy at maximum height where velocity is zero. The launch velocity

v = \frac{1}{2}v_e = \frac{1}{2}\sqrt{\frac{2GM}{R}}

gives an initial kinetic energy of

\frac{GMm}{4R}

. Combined with initial potential energy

-\frac{GMm}{R}

, total energy is

-\frac{3GMm}{4R}

. Equating this to

-\frac{GMm}{R+h}

gives

R+h = \frac{4}{3}R

, yielding a height above the surface of

h = \frac{R}{3}

Step-by-Step Solution

Express the initial speed in terms of gravitational constant

G

, mass

M

, and radius

R

The escape velocity is

v_e = \sqrt{\frac{2GM}{R}}

. Thus, launch speed

v = \frac{1}{2}v_e = \frac{1}{2}\sqrt{\frac{2GM}{R}}

Escape velocity is defined as the minimum speed needed to escape the gravitational field.

Calculate the initial total mechanical energy at the planet's surface.

Initial kinetic energy

K_i = \frac{1}{2}m v^2 = \frac{1}{2}m\left(\frac{2GM}{4R}\right) = \frac{GMm}{4R}

. Surface potential energy

U_i = -\frac{GMm}{R}

. Total energy

E_i = K_i + U_i = \frac{GMm}{4R} - \frac{GMm}{R} = -\frac{3GMm}{4R}

Total mechanical energy is the sum of kinetic energy and gravitational potential energy.

Apply energy conservation to find the maximum distance from the planet's center.

At maximum height

h

, speed is zero (

K_f = 0

), so distance from center is

r = R + h

. Energy

E_f = -\frac{GMm}{R+h}

. Equating

E_i = E_f

gives

-\frac{3GMm}{4R} = -\frac{GMm}{R+h} \implies R+h = \frac{4}{3}R \implies h = \frac{R}{3}

Mechanical energy is conserved in a central gravitational force field.

Key Concept

Conservation of Mechanical Energy in a Gravitational Field

Estimated Time:1m 30s

Question 13074Question →

Match each market classification based on geographical scope and regulatory status on the left with its corresponding economic characteristic or example on the right.

Click a left item, then click its matching right item

Show answer & explanation

Answer

Local market matches transactions limited to a specific village or immediate neighborhood; National market matches trading of standardized commodities across all geopolitical zones; Open market matches an unrestricted trading environment without price controls; Black market matches illegal trading of restricted goods outside official price ceilings.

The pairings correctly match each market concept to its defining economic scope: local markets serve immediate small areas due to product perishability, national markets distribute goods nationwide across all zones, open markets rely on unrestricted supply and demand, and black markets operate illegally outside official price regulations.

Step-by-Step Solution

Analyze geographical scope classifications.

Local markets involve immediate community trading, whereas national markets span across the entire country.

Geographical classification depends on the area over which buyers and sellers interact.

Analyze legal and regulatory status classifications.

Open markets permit free pricing without statutory barriers, while black markets operate illicitly to bypass official price controls.

Legal classification distinguishes legitimate free-market activities from clandestine trading violating government mandates.

Key Concept

Classification of markets by geographical extent and legal status

Question 13075Question →

Which of the following factors is a direct determinant of economic growth because it shifts a nation's production possibility curve outward?

Continuous technological innovation that enhances labor productivity

Reallocation of existing unemployed resources from agriculture to manufacturing

An increase in nominal national income resulting purely from price inflation

An expansion of redistributive welfare transfers to low-income households

Show answer & explanation

Answer: Continuous technological innovation that enhances labor productivity

Answer

Continuous technological innovation that enhances labor productivity is a direct factor driving economic growth by expanding real productive capacity.

Continuous technological innovation increases overall factor productivity and efficiency, enabling an economy to produce more output from given inputs and shifting the production possibility curve outward.

Step-by-Step Solution

Define economic growth in macroeconomic terms.

Economic growth is the long-term increase in a nation's real output and total productive capacity.

True economic growth requires expanding the physical or technological ability to produce more goods and services.

Identify factors that cause an outward shift in the Production Possibility Curve (PPC).

Technological progress improves efficiency per unit of input, expanding the production frontier.

Only improvements in resource quantity or quality (such as technology and capital accumulation) shift the PPC outward.

Key Concept

Determinants of Economic Growth

Question 13076Question →

A chromosomal inversion alters the linear sequence of genes on a chromosome without altering the total quantity of genetic material.

True

False

Show answer & explanation

Answer: True

Answer

True. Chromosomal inversion rearranges the linear order of genes without changing the total quantity of genetic material.

Chromosomal inversion is a structural aberration in which a segment of a chromosome breaks off, flips

180^\circ

, and reinserts itself into the chromosome. Since no chromosomal material is deleted or duplicated, the total amount of genetic material is unchanged, even though gene sequence order is rearranged.

Step-by-Step Solution

Define the structural alteration that occurs during chromosomal inversion.

A chromosome segment breaks at two points, rotates by

180^\circ

, and reattaches into the same position on the chromosome.

Understanding the mechanism of inversion is necessary to determine if genetic content is modified in quantity.

Evaluate if genetic material is added or removed during this process.

Because no DNA segment is excised permanently or duplicated, the total amount of genetic material remains unchanged.

Distinguishing balanced structural changes (inversion, balanced translocation) from unbalanced ones (deletion, duplication) confirms the truth value of the statement.

Key Concept

Chromosomal Inversion and Structural Aberrations

Estimated Time:1m 0s

Question 13077Question →

A government policy introducing a heavy subsidy on electric vehicles leads to a widespread reduction in their retail market price. Consequently, consumer purchasing patterns alter, causing a noticeable drop in the market demand for petrol-powered cars at every price level. Which of the following correctly describes how this economic event affects the market demand curve for petrol-powered cars?

An inward (leftward) shift of the demand curve, because electric vehicles and petrol-powered cars are substitute goods in competitive demand.

An upward movement along the existing demand curve, reflecting a decrease in the quantity demanded of petrol-powered cars.

An outward (rightward) shift of the demand curve, because electric vehicles and petrol-powered cars are complementary goods in joint demand.

A downward movement along the existing demand curve, reflecting an increase in the quantity demanded of petrol-powered cars.

Show answer & explanation

Answer: An inward (leftward) shift of the demand curve, because electric vehicles and petrol-powered cars are substitute goods in competitive demand.

Answer

An inward (leftward) shift of the demand curve, because electric vehicles and petrol-powered cars are substitute goods in competitive demand.

Electric vehicles and petrol-powered cars are substitute goods in competitive demand. When the price of electric vehicles drops due to subsidies, consumers substitute away from petrol-powered cars. Because this change is triggered by a non-price determinant (price of a substitute good) rather than a change in the price of petrol-powered cars themselves, the market demand for petrol-powered cars decreases at every price point, causing an inward (leftward) shift of its demand curve.

Step-by-Step Solution

Identify the relationship between the two goods described in the scenario.

Electric vehicles and petrol-powered cars are substitute goods (competitive demand) because consumers choose between them to fulfill similar transportation needs.

Determining whether goods are substitutes or complements dictates the direction of the demand change when the price of one changes.

Analyze the impact of a price decrease in the substitute good on the target commodity's market.

A fall in the price of electric vehicles makes them relatively cheaper, causing consumers to switch away from petrol-powered cars, reducing overall demand for petrol-powered cars.

Cross-price elasticity for substitutes is positive: a decrease in the price of Good X leads to a decrease in demand for Good Y.

Distinguish between a change in quantity demanded and a change in demand.

Since the change is driven by a non-price determinant (the price of a substitute) rather than the price of petrol-powered cars itself, the effect is represented by a leftward (inward) shift of the demand curve.

Price changes of the good itself cause movements along the curve, while non-price factors cause shifts of the entire curve.

Key Concept

Impact of Substitute Good Prices on Demand Curve Shifts

Estimated Time:1m 0s

Question 13078Question →

Complete the statement below by identifying the correct economic classification of demand.

Fill in the blanks below

A shoe factory increases its orders for natural rubber to produce more athletic sneakers following a surge in consumer demand for footwear. In economic analysis, the factory's demand for natural rubber is classified as demand.

Show answer & explanation

Answer

The demand for natural rubber in this scenario is classified as derived demand.

Derived demand occurs when the demand for a good or factor of production is dependent on the demand for another final good or service. Natural rubber is demanded by manufacturers to make sneakers, so its demand stems directly from consumer demand for footwear.

Step-by-Step Solution

Examine the relationship between the raw material (natural rubber) and the final product (athletic sneakers).

Natural rubber is an input used in the production process of footwear, rather than a final consumer good.

Understanding whether a good is consumed directly or used as a production input determines its demand classification.

Apply the appropriate demand type definition.

Demand for an input or factor of production that arises directly from the demand for the final commodity it produces is defined as derived demand.

The factory demands rubber only because consumers demand sneakers.

Key Concept

Derived Demand

Estimated Time:1m 0s

Question 13079Question →

Evaluate the market developments below and match each change in economic conditions (Left) to its corresponding geometric effect on the demand curve for the affected commodity (Right).

Click a left item, then click its matching right item

Show answer & explanation

Answer

The market developments match their demand curve effects as follows: Petrol price increase shifts CNG bus demand curve outward (competitive substitute); local rice price reduction causes downward movement along its demand curve (increase in quantity demanded); falling household income shifts cassava flour demand curve outward (inferior good response); health warnings shift refined sugar demand curve inward (adverse taste change).

Each market event is correctly paired by distinguishing between own-price effects (movements along the demand curve) and non-price determinants (shifts of the demand curve). The price hike of petrol increases demand for CNG buses as a substitute (rightward shift). The price drop of local rice increases quantity demanded along its current curve (downward movement). Falling incomes boost demand for cassava flour due to its inferior good property (rightward shift). Health advisories weaken preferences for sugar, shifting its demand curve leftward.

Step-by-Step Solution

Analyze the relationship between petrol and CNG commercial buses.

Since petrol and CNG are substitute energy sources in competitive demand, a rise in the price of petrol increases demand for CNG buses, causing an outward (rightward) shift of the demand curve.

Cross-price effects of substitute goods shift the demand curve of the alternative good.

Evaluate the impact of a price change on local unpolished rice itself.

A change in the commodity's own price alters quantity demanded, causing a downward movement along the existing demand curve.

Own-price changes never shift the demand curve; they alter the quantity demanded along the curve.

Examine the income effect on low-quality cassava flour as an inferior good.

Because cassava flour is an inferior good, lower real income causes consumers to buy more of it, shifting its demand curve outward to the right.

Inferior goods have an inverse relationship between consumer income and demand.

Assess the effect of public health warnings on refined sugar consumption.

Negative publicity reduces consumer preference for sugar, decreasing demand at all price levels and shifting the demand curve inward to the left.

Non-price determinants such as tastes and preferences shift the entire demand curve.

Key Concept

Distinguishing between changes in quantity demanded (own-price movements along the curve) and changes in demand (non-price factor shifts involving income, tastes, and substitute prices).

Question 13080Question →

Match each industrial strategy or policy instrument on the left with its correct economic definition on the right.

Click a left item, then click its matching right item

Show answer & explanation

Answer

Import Substitution Industrialization matches with replacing foreign imported goods with domestically manufactured alternatives; Export Promotion Industrialization matches with encouraging domestic industries to manufacture goods targeted at external international markets; Tariff Protection matches with levying customs duties on foreign imports to shield nascent domestic producers.

Import Substitution Industrialization is an inward-looking policy aimed at replacing imports with local goods, Export Promotion Industrialization is an outward-looking policy aimed at producing goods for foreign export, and Tariff Protection is a commercial policy tool using import taxes to protect home industries.

Step-by-Step Solution

Define Import Substitution Industrialization

Import Substitution Industrialization corresponds to replacing foreign imported goods with domestically manufactured alternatives.

The primary objective of import substitution is achieving self-reliance by producing previously imported consumer goods locally.

Define Export Promotion Industrialization

Export Promotion Industrialization corresponds to encouraging domestic industries to manufacture goods targeted at external international markets.

Export promotion focuses on industrializing by expanding sales in international markets to earn foreign exchange.

Define Tariff Protection

Tariff Protection corresponds to levying customs duties on foreign imports to shield nascent domestic producers.

Tariffs are trade barriers designed to safeguard local infant industries from foreign competition.

Key Concept

Core Strategies and Policy Tools of Industrialization

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