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 Which circuit element(s) will oppose the change in circuit current? Resistance only Capacitance only Inductance only Inductance and capacitance Resistance only Capacitance only Inductance only Inductance and capacitance 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. No Yes No Yes ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction The magnitude of the induced e.m.f. in a conductor depends on the Rate of change of flux-linkages Amount of flux cut Flux density of the magnetic field Amount of flux linkages Rate of change of flux-linkages Amount of flux cut Flux density of the magnetic field Amount of flux linkages ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction An e.m.f. of 16 volts is induced in a coil of inductance 4H. The rate of change of current must be 16 A/s 20 A/s 12 A/s 4 A/s 16 A/s 20 A/s 12 A/s 4 A/s ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction As per Faraday's laws of electromagnetic induction, an e.m.f. is induced in a conductor whenever it Cuts magnetic flux Moves parallel to the direction of the magnetic field Lies in a magnetic field Lies perpendicular to the magnetic flux Cuts magnetic flux Moves parallel to the direction of the magnetic field Lies in a magnetic field Lies perpendicular to the magnetic flux ANSWER DOWNLOAD EXAMIANS APP
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