Electromagnetic induction Higher the self-inductance of a coil, Lower the e.m.f. induced Greater the flux produced by it Longer the delay in establishing steady current through it Lesser its weber-turns Lower the e.m.f. induced Greater the flux produced by it Longer the delay in establishing steady current through it Lesser its weber-turns ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction A laminated iron core has reduced eddy-current losses because The laminations are insulated from each other The magnetic flux is concentrated in the air gap of the core More wire can be used with less D.C. resistance in coil The laminations are stacked vertically The laminations are insulated from each other The magnetic flux is concentrated in the air gap of the core More wire can be used with less D.C. resistance in coil The laminations are stacked vertically ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction A crack in the magnetic path of an inductor will result in Zero inductance Reduced inductance Unchanged inductance Increased inductance Zero inductance Reduced inductance Unchanged inductance Increased inductance ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction A 500 turns solenoid develops an average induced voltage of 60 V. Over what time interval must a flux change of 0.06 Wb occur to produce such a voltage? None of the listed here 0.1 s 0.5 s 0.2 s None of the listed here 0.1 s 0.5 s 0.2 s ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction If current in a conductor increases then according to Lenz's law self-induced voltage will Produce current opposite to the increasing current Aid the increasing current Aid the applied voltage Tend to decrease the amount of current Produce current opposite to the increasing current Aid the increasing current Aid the applied voltage Tend to decrease the amount of current ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction The self inductances of two coils are 8 mH and 18 mH. If the coefficient of coupling is 0.5, the mutual inductance of the coils is 12 mH 18 mH 36 mH 6 mH 12 mH 18 mH 36 mH 6 mH ANSWER DOWNLOAD EXAMIANS APP
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