Question
Physics Question on Faradays laws of induction
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
A
0.05 V
B
0.5 V
C
500 V
D
50 V
Answer
0.5 V
Explanation
Solution
e=Ldtdi
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
0.05 V
0.5 V
500 V
50 V
0.5 V
e=Ldtdi