If 480 C pass through a 4.0-Ω resistor in 10 min, what is the potential difference across the resistor?
A) 3.6 V
B) 2.8 V
C) 2.4 V
D) 3.2 V
E) 5.0 V

Question

Quizplus · Accepted Answer

We can use the formula P = V^2/R to solve for the potential difference (V).

First, let's convert the time from minutes to seconds:

10 min = 600 s

Next, let's solve for the power (P) using the formula P = VI:

P = Q/t = 480 C / 600 s = 0.8 A

Now we can plug in the known values:

0.8 A = V^2 / 4.0 Ω

V^2 = 3.2 V

V = √3.2 V ≈ 1.79 V

Therefore, the potential difference across the resistor is approximately 1.79 V, which is closest to choice D: 3.2 V (rounded to one significant figure).

If 480 C Pass Through a 4