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 24 mH 28 mH 3 mH 12 mH 24 mH 28 mH 3 mH 12 mH ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction Which of the following inductor will have the least eddy current losses? Iron core Air core Powdered iron core Laminated iron core Iron core Air core Powdered iron core Laminated iron core ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction The law that the induced e.m.f. and current always oppose the cause producing them is due to Lenz Faraday Coulomb Newton Lenz Faraday Coulomb Newton 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 For a purely inductive circuit which of the following is true? Actual power of the circuit is zero Any capacitance even if present in the circuit will not be charged Apparent power is zero Relative power is zero Actual power of the circuit is zero Any capacitance even if present in the circuit will not be charged Apparent power is zero Relative power is zero 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 12 A/s 20 A/s 16 A/s 4 A/s 12 A/s 20 A/s 16 A/s ANSWER DOWNLOAD EXAMIANS APP
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