A 12-V battery has an internal resistance of 0.20 $\Omega$.If the battery is being charged by a current of 30 A,the magnitude of the potential difference between its terminals is
A)18 V
B)6.0 V
C)42 V
D)0
E)12 V

Question

Quizplus · Accepted Answer

The potential difference (V) across the battery's terminals when charging can be calculated using Ohm's Law (V = IR) for the internal resistance, plus the battery's own voltage. Here, I = 30 A, R = 0.20 Ω, so V = IR = 30 * 0.20 = 6 V. This voltage is in addition to the battery's own voltage of 12 V, making the total potential difference 12 V + 6 V = 18 V.

A 12-V Battery Has an Internal Resistance of 0 Ω\OmegaΩ If the Battery Is Being Charged by a Current of .If

A 12-V Battery Has an Internal Resistance of 0 $\Omega$ If the Battery Is Being Charged by a Current of .If