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
Consider the conducting square loop shown in fig. If the switch is closed and after some time it is opened again, the cl...A and B are two metallic rings placed at opposite sides of an infinitely long straight conducting wire as shown. If curr...The radius of the circular conducting loop shown in figure is R. Magnetic field is decreasing at a constant rate a. Resi...A metal rod of resistance 20 Ω is fixed along a diameter of conducting ring of radius 0.1 m and lies in x-y plane. ...Two identical circular coils A and B are placed parallel to each other with their centers on the same axis. The coil B c...