ElectroMagnetic InductionHard
Question
In an LR circuit current at t = 0 is 20 A. After 2s it reduces to 18 A. The time constant of the circuit is
(in second):
(in second):
Options
A.In 
B.2
C.
D.2 In
or t = More ElectroMagnetic Induction Questions
In transformer, power of secondary coil is:-...The figure shows a rod of length l with points A and B on it. The rod is moved in a uniform magnetic field (B0) in diffe...A coil of self inductance 50 Henry is joined to the terminals of a battery of emf 2 volts through a resistance of 10 ohm...Which of the following materials is repelled by an external magnetic field :-...Two bulb of same rating B1 and B2 are connected in series with the inductors as shown in figure which bulb take more tim...