Electromagnetic induction A laminated iron core has reduced eddy-current losses because 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 The laminations are stacked vertically 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 18 mH 36 mH 12 mH 6 mH 18 mH 36 mH 12 mH 6 mH ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction A 200 turn coil has an inductance of 12 mH. If the number of turns is increased to 400 turns, all other quantities (area, length etc.) remaining the same, the inductance will be 48 mH 24 mH 6 mH 12 mH 48 mH 24 mH 6 mH 12 mH ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction A moving magnetic field will produce the same effect as a conductor that is moving. True False True False ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction An open coil has Zero resistance and inductance Infinite resistance and zero inductance Zero resistance and high inductance Infinite resistance and normal inductance Zero resistance and inductance Infinite resistance and zero inductance Zero resistance and high inductance Infinite resistance and normal inductance ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction Two coils have inductances of 8 mH and 18 mH and a coefficient of coupling of 0.5. If the two coils are connected in series aiding, the total inductance will be 38 mH 48 mH 36 mH 30 mH 38 mH 48 mH 36 mH 30 mH ANSWER DOWNLOAD EXAMIANS APP
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