ElectroMagnetic InductionEasy
Question
If the rotational velocity of a motor armature is doubled, then back emf will :-
Options
A.Become half
B.Become double
C.Become quadruple
D.Remain unchanged
More ElectroMagnetic Induction Questions
A constant current i maintained in a solenoid. Which of the following quantities will increase if an iron rod is inserte...A magent is taken towards a coil : (a) rapidly (b) slowly Then the induced emf is:-...A flexible wire bent in the form of a circle is placed in a uniform magnetic field perpendicular to the plane of the coi...In a uniform magnetic field of induction B a wire in the form of semicircle of radius r rotates about the diameter of th...An e.m.f. of 15 volt is applied in a circuit containing 5 henry inductance and 10 ohm resistance. The ratio of the curre...