Question

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?

Answer 1

Answer:

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