-In the Figure,a Wire and a 10 Ω Resistor Are

Multiple Choice

-In the figure,a wire and a 10 Ω resistor are used to form a circuit in the shape of a square, 20 cm by 20 cm.A uniform but nonsteady magnetic field is directed into the plane of the circuit.The magnitude of the magnetic field is decreased from 2.70 T to 0.90 T in a time interval of
96 ms.The average induced current and its direction through the resistor,in this time interval,are closest to:

A) 75 mA,from b to a
B) 45 mA,from b to a
C) 75 mA,from a to b
D) 45 mA,from a to b
E) 110 mA,from a to b