Electromagnetic induction The law that the induced e.m.f. and current always oppose the cause producing them is due to Faraday Newton Lenz Coulomb Faraday Newton Lenz Coulomb 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 4 A/s 16 A/s 12 A/s 20 A/s 4 A/s 16 A/s 12 A/s 20 A/s ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction A coil is wound on iron core which carries current I. The self-induced voltage in the coil is not affected by Variation in coil current Variation in voltage to the coil Change of number of turns of coil The resistance of magnetic path Variation in coil current Variation in voltage to the coil Change of number of turns of coil The resistance of magnetic path ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction Higher the self-inductance of a coil, Longer the delay in establishing steady current through it Greater the flux produced by it Lesser its weber-turns Lower the e.m.f. induced Longer the delay in establishing steady current through it Greater the flux produced by it Lesser its weber-turns Lower the e.m.f. induced ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction Increasing the field or increasing the current will decrease the force on the conductor. No Yes No Yes 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 48 mH 12 mH 3 mH 24 mH 48 mH 12 mH 3 mH 24 mH ANSWER DOWNLOAD EXAMIANS APP