A 5-turn square loop (10 cm along a side, resistance = 4.0 ?) is placed in a magnetic field that makes an angle of 30° with the plane of the loop. The magnitude of this field varies with time according to B = 0.50t2, where t is measured in s and B in T. What is the induced current in the coil at t = 4.0 s?
A. 25 mA
B. 5.0 mA
C. 13 mA
D. 43 mA
E. 50 mA
Answer: A
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