A workshop bench grinder is connected to a 120\text{ V} electrical supply line and draws a… — Armed Services Vocational Aptitude Battery (ASVAB)

A workshop bench grinder is connected to a $120\text{ V}$ electrical supply line and draws a steady current of $5\text{ A}$ . What is the total electrical power consumed by the grinder in watts ( $\text{W}$ )?

Answer: 600 W

Answer

600 W

Electrical power is calculated using the formula

P = V \times I

, where

P

is power in watts,

V

is electromotive force in volts, and

I

is current in amperes. Substituting the given values gives

P = 120\text{ V} \times 5\text{ A} = 600\text{ W}

Step-by-Step Solution

Identify the given circuit parameters

Voltage

V = 120\text{ V}

and Current

I = 5\text{ A}

Determining the known values is necessary to select the correct power formula.

Apply Watt's Law formula for power

P = V \times I

Watt's Law defines electrical power in watts as the product of potential difference in volts and current in amperes.

Calculate the total power

P = 120\text{ V} \times 5\text{ A} = 600\text{ W}

Multiplying voltage by current yields the total power consumed by the electrical device.

Key Concept

Electrical power (

P

) in a circuit is the rate at which electrical energy is converted into another form of energy, calculated using Watt's Law as

P = V \times I

Estimated Time:45s

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