ElectroMagnetic InductionHard
Question
The armature of D.C. motor has 20Ω resistance it draws current of 1.5 ampere when run by 220 volts D.C. supply. The value of back e.m.f. induced in it will be : -
Options
A.150 V
B.170 V
C.180 V
D.190 V
More ElectroMagnetic Induction Questions
Which one of the following is ferro-magnetic :-...Which of the following materials is repelled by an external magnetic field :-...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...A current i = 3.36 (1 + 2t) × 10-2 A increases at a steady rate in a loop straight wire. A very small circuler loop...The flux linked with a coil at any instant ′t′ is given by φ = 10t2 - 50t + 250 The induced emf at t = ...