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 28 mH 12 mH 24 mH 3 mH 28 mH 12 mH 24 mH 3 mH ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction In case of an inductance, current is proportional to Voltage across the inductance Both of the listed here Magnetic field None of the listed here Voltage across the inductance Both of the listed here Magnetic field None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction A coil induces 350 mV when the current changes at the rate of 1 A/s. The value of inductance is 3500 mH 250 mH 350 mH None of the listed here 3500 mH 250 mH 350 mH None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction The self-inductance of the coil may be defined as equal to the e.m.f. induced in volts when the current in the circuit changes at the rate of unit Weber turns. Yes No Yes No ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction A laminated iron core has reduced eddy-current losses because 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 More wire can be used with less D.C. resistance in coil The laminations are stacked vertically ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction A coil with negligible resistance has 50V across it with 10 mA. The inductive reactance is 5000 ohms 100 ohms 1000 ohms 500 ohms 5000 ohms 100 ohms 1000 ohms 500 ohms ANSWER DOWNLOAD EXAMIANS APP
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