The mutual inductance of a pair of a coil is 0.75 H. if the current in primary coil changes from 0.5 A to 0A in 0.01 s. the average induced emf in secondary coil is

Options

A. 73.5 V
B. 3.75 V
C. 37.5 V
D. 3.5 V

Answer

C

Explanation

`e=M(dI)/(dt)`
`=(0.75xx0.5)/(0.01)=37.5`V