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 be 24 mH 48 mH 12 mH 3 mH 24 mH 48 mH 12 mH 3 mH 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 More wire can be used with less D.C. resistance in coil The magnetic flux is concentrated in the air gap of the core The laminations are insulated from each other The laminations are stacked vertically More wire can be used with less D.C. resistance in coil The magnetic flux is concentrated in the air gap of the core The laminations are insulated from each other The laminations are stacked vertically ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction In an iron cored coil the iron core is removed so that the coil becomes an air cored coil. The inductance of the coil will Remains same Increases None of the listed here Decreases Remains same Increases None of the listed here Decreases 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 None of the listed here 250 mH 350 mH 3500 mH None of the listed here 250 mH 350 mH 3500 mH ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction A coil with negligible resistance has 50V across it with 10 mA. The inductive reactance is 500 ohms 1000 ohms 5000 ohms 100 ohms 500 ohms 1000 ohms 5000 ohms 100 ohms ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS