Two large parallel conducting plates are 10 cm apart and have a potential difference V. For the points A and B shown in the original figure, the potential difference V(AB) is:

Question

G1 Physics · Accepted Answer

Between large parallel plates, the electric field is uniform: E = V/d, where d = 10 cm. Potential difference depends only on separation along the field direction. From the original figure, the horizontal separation corresponding to points A and B is CB = 4 cm. Therefore, V(AB) = E(CB) = (V/10)(4) = 2V/5. Correct option: C.