Electromagnetic induction Which circuit element(s) will oppose the change in circuit current? Resistance only Inductance only Capacitance only Inductance and capacitance Resistance only Inductance only Capacitance only Inductance and capacitance ANSWER DOWNLOAD EXAMIANS APP
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 12 mH 3 mH 48 mH 24 mH 12 mH 3 mH 48 mH 24 mH ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction If current in a conductor increases then according to Lenz's law self-induced voltage will Tend to decrease the amount of current Produce current opposite to the increasing current Aid the increasing current Aid the applied voltage Tend to decrease the amount of current Produce current opposite to the increasing current Aid the increasing current Aid the applied voltage ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction Higher the self-inductance of a coil, Lesser its weber-turns Greater the flux produced by it Lower the e.m.f. induced Longer the delay in establishing steady current through it Lesser its weber-turns Greater the flux produced by it Lower the e.m.f. induced Longer the delay in establishing steady current through it ANSWER DOWNLOAD EXAMIANS APP
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 stacked vertically More wire can be used with less D.C. resistance in coil The laminations are insulated from each other The magnetic flux is concentrated in the air gap of the core The laminations are stacked vertically More wire can be used with less D.C. resistance in coil The laminations are insulated from each other 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
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