Electromagnetic induction The core of a coil has a length of 200 mm. The inductance of coil is 6 mH. If the core length is doubled, all other quantities, remaining the same, the inductance will 24 mH 3 mH 28 mH 12 mH 24 mH 3 mH 28 mH 12 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 6 mH 24 mH 12 mH 48 mH 6 mH 24 mH 12 mH ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction A laminated iron core has reduced eddy-current losses because 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 The magnetic flux is concentrated in the air gap of the core 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 36 mH 48 mH 30 mH 38 mH 36 mH 48 mH 30 mH 38 mH ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction Air-core coils are practically free from Hysteresis losses None of the listed here Both Hysteresis losses & Eddy current losses Eddy current losses Hysteresis losses None of the listed here Both Hysteresis losses & Eddy current losses Eddy current losses ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction The property of coil by which a counter e.m.f. is induced in it when the current through the coil changes is known as Mutual inductance Capacitance Series aiding inductance Self-inductance Mutual inductance Capacitance Series aiding inductance Self-inductance ANSWER DOWNLOAD EXAMIANS APP
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