Electromagnetic Induction Mcqs
Q.1: Which of the following circuit element stores energy in the electromagnetic field ?T
A. Inductance
B. Condenser
C. Variable resistor
D. Resistance
Q.2: Higher the self-inductance of a coil_____________?2
A. lesser its weber-turns
B. lower the e.m.f. induced
C. greater the flux produced by it
D. longer the delay in establishing steady current through it:
Q.3: Both the number of turns and the core length of an inductive coil are doubled. Its self-inductance will be_____________?x
A. unaffected
B. doubled
C. halved
D. quadrupled
Q.4: In an iron cored coil the iron core is removed so that the coil becomes an air cored coil. The inductance of the coil will_____________?
A. increase
B. decrease
C. remain the same
D. initially increase and then decrease$
Q.5: As per Faradays laws of electromagnetic induction, an e.m.f. is induced in a conductor whenever it_______________?u
A. lies perpendicular to the magnetic flux'
B. lies in a magnetic field
C. cuts magnetic flux
D. moves parallel to the direction of the magnetic field5
Q.6: The inductance of a coil will increase under all the following conditions except______________?_
A. when more length for the same number of turns is provided9
B. when the number of turns of the coil increase-
C. when more area for each turn is provided(
D. when permeability of the core increases'
Q.7: An open coil has_____________?
A. zero resistance and inductance
B. infinite resistance and zero inductance'
C. infinite resistance and normal inductance)
D. zero resistance and high inductance#
Q.8: The direction of induced e.m.f. can be found by_____________?=
A. Laplaces law
B. Lenzs law
C. Flemings right hand rule
D. Kirchhoff s voltage law
Q.9: The property of coil by which a counter e.m.f. is induced in it when the current through the coil changes is known as__________?
A. self-inductance
B. mutual inductance
C. series aiding inductance
D. capacitance
Q.10: Air-core coils are practically free from______________?7
A. hysteresis losses
B. eddy current losses
C. both (A) and (B)
D. none of the above

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