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One hundred turns of insulated copper wire are wound into a solenoid of cross sectional area...

One hundred turns of insulated copper wire are wound into a solenoid of cross sectional area 0.100 m2. Connecting the coil to a 10  resistor completes the circuit. The magnetic field along the coil axis is made to change from 1.00 T in one direction to 1.00 T in the other direction. The total charge which flows through the resistor in this process is:
a. 10 mC
b. 20 mC
c. 1.0 C
d. 2.0 C
e. 0.20 C

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