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Mutual inductance of system of two coils...

Mutual inductance of system of two coils is 0.3 H. If the current in the one coil is changed from 10A to 40A in 0.01 sec, the average induced emf in the other coil is ...... volt.

A

9

B

900

C

9000

D

90000

Text Solution

Verified by Experts

The correct Answer is:
B
Value of average induced emf in second coil
`epsilon_2=M_21 (dI_1)/(dt)`
`=0.3xx(40-10)/0.01`
`=0.3xx30/0.01`
`therefore epsilon_2`=900 V
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