This question is about a wire coil inductor. Which of the following is/are true?

Question

This question is about a wire coil inductor. Which of the following is/are true? Select all that are correct.

A If a non-zero constant current flows through the inductor, a finite voltage across the inductor will develop.

B If the current through the inductor increases with time slowly, the magnetic flux through the inductor also increases with time.

C If the current through the inductor increases with time slowly, a finite voltage across the inductor will develop.

D If a non-zero constant current flows through the inductor, there always is a non-zero magnetic flux threading the inductor.

Explanation / Answer

A If a non-zero constant current flows through the inductor, a finite voltage across the inductor will develop.-False
B If the current through the inductor increases with time slowly, the magnetic flux through the inductor also increases with time.-True
C If the current through the inductor increases with time slowly, a finite voltage across the inductor will develop.-True
D If a non-zero constant current flows through the inductor, there always is a non-zero magnetic flux threading the inductor.-True

It also comes from V=-Ldi/dt

and flux=LI

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