When current in a coil changes from 5 A to 2 A in 0.1 s, average voltage of 50 V is produced. The self - inductance of the coil is :

Options

A. 1.67H
B. 6H
C. 3H
D. 0.67H

Answer

A

Explanation

Magnetic flux
`phi=LIimplies(Delta phi)/(Delta t)=L(DeltaI)/(Deltat)`
`:.(epsilon_("ind"))_("average")=|(Deltaphi)/(Deltat)|=L|(DeltaI)/(Deltat)|`
`implies50=Lxx(5-2)/0.1`
`implies5/3=L`
`impliesL=1.67H`