Question

exam lesson name: electricity and electronics
exam number: 700798rr
exam guidelines
exam instructions
question 10 of 20 :
select the best answer for the question.

1. which of the following is an accurate description of the relationship demonstrated in ohms law?

a. the electric potential (volts) divided by the current (amperes) equals the resistance (ohms).
b. the resistance (ohms) divided by the current (amperes) equals the electric potential (volts).
c. the electric potential (amperes) divided by the resistance (ohms) equals the current (volts).
d. the electric potential (volts) multiplied by the resistance (ohms) equals the current (amperes).
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Explanation:

Ohm's Law is given by the formula \( V = IR \), where \( V \) is electric potential (volts), \( I \) is current (amperes), and \( R \) is resistance (ohms). Rearranging this formula:

• For option A: \( R=\frac{V}{I} \), which matches the rearrangement (resistance equals voltage divided by current).
• Option B: Rearranging \( V = IR \) gives \( V = I\times R \), not \( \frac{R}{I} \), so B is incorrect.
• Option C: Units are wrong (electric potential is volts, not amperes; current is amperes, not volts), and the formula \( I=\frac{V}{R} \) is misrepresented in units and wording, so C is incorrect.
• Option D: The correct formula for current is \( I=\frac{V}{R} \), not \( I = V\times R \), so D is incorrect.

Answer:

A. The electric potential (volts) divided by the current (amperes) equals the resistance (ohms).