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The relation between current and voltage in the case of inductor is?

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The relation between current and voltage in the case of inductor is?

(a) v=Ldt/di

(b) v=Ldi/dt

(c) v=dt/di

(d) v=di/dt

I have been asked this question during an interview.

Question is taken from Circuit Elements in the S-Domain in section Application of the Laplace Transform in Circuit Analysis of Network Theory

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The correct option is (b) v=Ldi/dt

The explanation: Consider an inductor with an initial current Io. The time domain relation between current and voltage is v=Ldi/dt.

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