There are no changing magnetic fields in the problem, so we can apply Kirchhoff's Law around the loop.
where we have modeled the battery as an ideal voltage source of in series with a resistor of . We are given that (the problem statement does not explicitly tell us in which direction the current is flowing, but if the current is assumed to flow in counterclockwise direction, then the resistance turns out to be negative, which is absurd) and from this we can find the value of : Therefore, answer (C) is correct. |

Please send questions or comments to X@gmail.com where X = physgre.