Question

What are the values of the self-induced emf in the circuit of the previous problem at the times indicated therein?

Answer 1

At 100 m/s Induced EMF is 0.27 V

Explanation:

a) For first case at t = 100 ms

$\frac {di}{dt}$ = 0.27  

Induced emf = $\frac {Ldi}{dt} = 1 \times 0.27$ = 0.27V  

(b) For the second case at t = 200ms  

$\frac {di}{dt}$ = 0.036  

Induced emf = $\frac {Ldi}{dt} = 1 \times 0.036$ = 0.036V  

(c) For the third case at t = 1s  

$\frac {di}{dt} = 4.1 \times 10^_^9$ V  

Induced emf = $\frac {Ldi}{dt} = \frac {Ldi}{dt}$ = $4.1 \times 10^_^9$