The south pole of a bar magnet is moved toward a short helical coil of wire (solenoid) along the axis of the coil. The coil has 100 turns and the ends of the coil are connected to form a closed circuit. If the coil is replaced with a single loop of the same type of wire, and the magnet is moved exactly as before, the current induced in the loop is
A. zero in both cases.
B. 100 times larger.
C. 100 times smaller.
D. the same as in the coil.
Answer: C
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