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 3 mH 24 mH 28 mH 12 mH 3 mH 24 mH 28 mH 12 mH 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 Change of number of turns of coil Variation in voltage to the coil The resistance of magnetic path Variation in coil current Change of number of turns of coil Variation in voltage to the coil The resistance of magnetic path Variation in coil current 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 For a purely inductive circuit which of the following is true? Apparent power is zero Any capacitance even if present in the circuit will not be charged Actual power of the circuit is zero Relative power is zero Apparent power is zero Any capacitance even if present in the circuit will not be charged Actual power of the circuit is zero Relative power is zero ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction An open coil has Zero resistance and high inductance Zero resistance and inductance Infinite resistance and zero inductance Infinite resistance and normal inductance Zero resistance and high inductance Zero resistance and inductance Infinite resistance and zero inductance Infinite resistance and normal inductance ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction The direction of induced e.m.f. can be found by Lenz's law Kirchhoff s voltage law Laplace's law Fleming's right hand rule Lenz's law Kirchhoff s voltage law Laplace's law Fleming's right hand rule ANSWER DOWNLOAD EXAMIANS APP
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