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
