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 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 ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction Lenz's law is a consequence of the law of conservation of Energy Charge Induced current Induced e.m.f. Energy Charge Induced current Induced e.m.f. ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction Two 300 uH coils in series without mutual coupling have a total inductance of 1200 uH 600 uH 900 uH 300 uH 1200 uH 600 uH 900 uH 300 uH ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction Air-core coils are practically free from Hysteresis losses Eddy current losses Both Hysteresis losses & Eddy current losses None of the listed here Hysteresis losses Eddy current losses Both Hysteresis losses & Eddy current losses None of the listed here 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 12 mH 24 mH 48 mH 6 mH 12 mH 24 mH 48 mH 6 mH 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 30 mH 36 mH 48 mH 38 mH 30 mH 36 mH 48 mH 38 mH ANSWER DOWNLOAD EXAMIANS APP
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