A 17 H inductor carries a current of 1.8 A. At what rate must the current be changed to produce a 70 V emf in the inductor?

at rate the current change is 6.75 A / sec

Explanation:

given data

inductance L = 17 H

current I = 1.8 A

emf e = 70 V

to find out

At what rate must the current be changed

solution

we will apply here emf formula that is

emf = inductance (di/dt)

so here (di/dt) will be

di/dt = emf / inductance ... 1

put value of emf and inductance in equation 1 we get rate

di/dt = 81 / 12

di/dt = 6.75 A / sec

so at rate the current change is 6.75 A / sec