Question

There will be no induced voltage in an inductor if: a) the current is sinusoidal, b) the current is constant, c) the average of current is zero, d) the average of the current is negative.

Answer 1

Answer:

The correct option is b

Explanation:

Generally the induced voltage in an inductor is mathematically represented as  

        $V = L * \frac{\Delta I }{\Delta t}$

Now  $\frac{\Delta I }{\Delta t}$  is the change in voltage with respect to time , when this is zero i.e when the current is not changing(what this means is when current is constant ) the induced voltage becomes    

        $V = L * 0$

=>     $V = 0 \ V$

Hence if the current is not changing with respect to time there will be no induced voltage