You measure a 20-V potential difference across a 7.0-Ω resistor.What is the current flowing through it?
A)140 A
B)2.9 A
C)27 A
D)13 A
E)5.2 A

Question

Quizplus · Accepted Answer

We can use Ohm's Law which states that current (I) is equal to the potential difference (V) divided by the resistance (R): I = V/R. Plugging in the values given, we get I = 20 V / 7.0 Ω = 2.86 A or approximately 2.9 A. Therefore, choice B is the correct answer.

You Measure a 20-V Potential Difference Across a 7