Question

An inductor made as a solenoid of 300 turn with 5.00 cm long and 1.00 x10-4...

An inductor made as a solenoid of 300 turn with 5.00 cm long and 1.00 x10-4 m^2 cross section area is connected to a 75 resistor and 12 V battery. The switch is closed at time t = 0.
(a) What is the inductive time constant of the circuit?
(b) Calculate the current in the circuit 250 us after the switch is
closed.
(c) What is the magnitude and polarity of the back emf induced by
the inductor 250 us after the switch is closed?
(d) Calculate the energy stored in the inductor after one minute the
switch is closed.

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Homework Answers

Answer #1

firsly find inductance, and put it into the formula of current.

In part(d) current is zero,so energy stored in inductor is zero.

Energy = (1/2)L(I^2)

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