Question

A dc current of 2 A is passed through an inductance of 2 H for 2 sec. The induced emf is
1) 2 V
2) –2 V
3) 4 V
4) 0 V

Answer 1

4)-2 V


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Answer 2

Since inductor is directly connected to the current source , it will behave like a normal conductor and induced EMF at T=2s will be zero.
4)