試題詳解

36. A 30 turn square coil (length of side = 12 cm ) with a total resistance of 2.5 Ω is placed in a uniform magnetic field directed perpendicularly to the plane of the coil. The magnitude of the field varies with time according to B= Ae^8t, where A = 50 mT and t is measured in seconds. What is the magnitude in V of the induced emfin the coil at t = 0?
(A) 0.31
(B) 0.27
(C) 0.17
(D) 0.20
(E) 22 x 10^-3.