Electromagnetic induction Current changing from 8 A to 12 A in one second induced 20 volts in a coil. The value of inductance is 15 H 20 H 10 H 5 H 15 H 20 H 10 H 5 H 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 6 mH 12 mH 18 mH 36 mH 6 mH 12 mH 18 mH 36 mH ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction Which of the fpllowing inductor will have the least eddy current losses ? Powdered iron core Air core Iron core Laminated iron core Powdered iron core Air core Iron core Laminated iron core ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction Reversing the field or the current will reverse the force on the conductor. Yes No Yes No ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction An open coil has Zero resistance and inductance Infinite resistance and normal inductance Zero resistance and high inductance Infinite resistance and zero inductance Zero resistance and inductance Infinite resistance and normal inductance Zero resistance and high inductance Infinite resistance and zero inductance ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction A laminated iron core has reduced eddy-current losses because The laminations are stacked vertically The magnetic flux is concentrated in the air gap of the core The laminations are insulated from each other More wire can be used with less D.C. resistance in coil The laminations are stacked vertically The magnetic flux is concentrated in the air gap of the core The laminations are insulated from each other More wire can be used with less D.C. resistance in coil ANSWER DOWNLOAD EXAMIANS APP
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