4) A circular coil of 17 turns and radius 15.6cm surrounds a long solenoid of ra

Question

4) A circular coil of 17 turns and radius 15.6cm surrounds a long solenoid of radius 3.7cm and 1.00x103 turns per meter. The two are oriented so that the axis of the coil and the axis of the solenoid are parallel and the center of the coil is at the center of the solenoid. The current in the solenoid is 2.9A.

a) What is in Webers, the flux through the coil?

b) What would be in volts, the induced emf in the loop if the current in the solenoid is reduced to zero in 0.03 seconds?

The situation is reversed and our coil is placed such that it is surrounded by a long large solenoid of radius 2 x 15.6cm.

c) What is in Webers, the flux through the coil now? (use the same values for the other question variables)

Explanation / Answer

a=pi*r^2
n=1.00x103
di=2.9 A
dt=0.03 sec
M=m

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