A. when more length for the same number of turns is provided
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
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As per Faraday’s laws of electromagnetic induction, an e.m.f. is induced in a conductor whenever it_______________?
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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. 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 field
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Both the number of turns and the core length of an inductive coil are doubled. Its self-inductance will be_____________?
A. increase
B. decrease
C. remain the same
D. initially increase and then decrease
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Higher the self-inductance of a coil_____________?
A. unaffected
B. doubled
C. halved
D. quadrupled
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Which of the following circuit element stores energy in the electromagnetic field ?
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
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