Electromagnetic induction A conductor 2 meters long moves at right angles to a magnetic field of flux density 1 tesla with a velocity of 12.5 m/s. The induced e.m.f. in the conductor will be 12 V 25 V 10 V 15 V 12 V 25 V 10 V 15 V ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction An e.m.f. of 16 volts is induced in a coil of inductance 4H. The rate of change of current must be 20 A/s 4 A/s 16 A/s 12 A/s 20 A/s 4 A/s 16 A/s 12 A/s 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? 0.2 s None of the listed here 0.5 s 0.1 s 0.2 s None of the listed here 0.5 s 0.1 s ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction In case all the flux from the current in coil 1 links with coil 2, the coefficient of coupling will be 2.0 1.0 0.5 2.5 2.0 1.0 0.5 2.5 ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction A laminated iron core has reduced eddy-current losses because 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 The laminations are insulated from each other The magnetic flux is concentrated in the air gap of the core ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction An open coil has Infinite resistance and zero inductance Infinite resistance and normal inductance Zero resistance and high inductance Zero resistance and inductance Infinite resistance and zero inductance Infinite resistance and normal inductance Zero resistance and high inductance Zero resistance and inductance ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS