The mutual inductance of a pair of coils, each of N turns, is M henry. If a current of I ampere in one of the coils is brought to zero in t second, the emf induced per turn in the other coil, in volt, will be

Options

A. `(Ml)/(t)`
B. `(NMl)/(T)`
C. `(MN)/(lt)`
D. `(ML)/(Nt)`

Answer

A

Explanation

`e=M(dl)/(dt)` (in magnitude)
`impliese=NM((l)/(t))implies(e)/(N)=(Ml)/(t)`