Q. The average self-induced emf in a 25mH solenoid when the current in it falls from 0.2 A to 0 A in 0.01 second, is

1320 145 Electromagnetic Induction Report Error

A

0.05 V

21%

B

0.5 V

49%

C

500 V

18%

D

50 V

13%

Solution:

$e = L \frac{d i}{d t}$