[" a 25.A circular coil of radius "5" cm bas "500" urm of a wirs."],[" The appraximate value of the coeflicient of iclf-induction "],[" of the coil will be "quad " (b) "25times10^(-1)" mH "],[" (0) "25mH],[(6)-50times10^(-3)H],[" (c) "],[50times10^(-1)mH]

An inductance coil has a reactance of 100Omega.When an ACsignal of frequency 1000Hz is applied to the coil the applied voltage leads the current by "45^(@The self-inductance of the coil is: (A) "6.7times10^(-7)H],[" (В) "5.5times10^(-5)H],[" (C) "1.1times10^(-1)H],[" (D) "1.1times10^(-2)H]]

The currrent in a coil changesfrom 1mA to 5 mA in 4 milliseconds. If the co-efficient of self-inductance of the coil is 10 mH the magnitude of the “self-induced” emf is

A current in one coil changes from 5 A to 3 A in 0.2 sec and the co-efficient of mutual inductance of second coil is 10 mH. The e.m.f. induced in the 2nd coil is

A 100 turn coil of self-inductance 50 mH carries a current of 10 mA. Find the magnetic flux linked with each turn of coil.

A coil of inductance 8.4 mH and resistance 6 Omega are connected to a 12 V battery. At what time the current in the coil will be 1.0 A ?