An electric horn connected to a 12\text{ V} direct current (DC) automotive battery has an … — Armed Services Vocational Aptitude Battery (ASVAB)

An electric horn connected to a $12\text{ V}$ direct current (DC) automotive battery has an internal resistance of $3\ \Omega$ . What is the steady current flowing through the horn circuit? Complete the statement below.

Answer:According to Ohm's law, the current flowing through the horn is 【4】 amperes.

Answer

4 amperes (or 4)

According to Ohm's law, current is calculated using the formula

I = \frac{V}{R}

. Dividing the applied voltage (

12\text{ V}

) by the circuit resistance (

3\ \Omega

) gives a current of

4\text{ A}

Step-by-Step Solution

Identify the given electrical parameters from the problem statement

Voltage (

V

) =

12\text{ V}

, Resistance (

R

) =

3\ \Omega

Ohm's law relates voltage, current, and resistance in a closed DC circuit.

State Ohm's law rearranged to solve for current (

I

)

I = \frac{V}{R}

Current is directly proportional to voltage and inversely proportional to resistance.

Substitute the given numerical values into the formula and calculate

I = \frac{12\text{ V}}{3\ \Omega} = 4\text{ A}

Dividing

12

volts by

3

ohms yields

4

amperes.

Key Concept

Ohm's Law states that current (

I

) equals voltage (

V

) divided by resistance (

R

Estimated Time:45s

Question

Answer

Step-by-Step Solution

Key Concept

Common Mistakes

Topics

More questions from this topic