Electromagnetic induction The self inductances of two coils are 8 mH and 18 mH. If the coefficient of coupling is 0.5, the mutual inductance of the coils is 18 mH 12 mH 6 mH 36 mH 18 mH 12 mH 6 mH 36 mH 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 20 A/s 12 A/s 4 A/s 16 A/s 20 A/s 12 A/s 4 A/s 16 A/s ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction In case all the flux from the current in coil 1 links with coil 2, the coefficient of coupling will be 2.0 2.5 0.5 1.0 2.0 2.5 0.5 1.0 ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction Find the force acting on a conductor 3m long carrying a current of 50 amperes at right angles to a magnetic field having a flux density of 0.67 tesla 400 N 100 N 300 N 1000 N 400 N 100 N 300 N 1000 N ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction Which of the following circuit element stores energy in the electromagnetic field? Variable resistor Resistance Inductance Condenser Variable resistor Resistance Inductance Condenser ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction Air-core coils are practically free from Eddy current losses Both Hysteresis losses & Eddy current losses None of the listed here Hysteresis losses Eddy current losses Both Hysteresis losses & Eddy current losses None of the listed here Hysteresis losses ANSWER DOWNLOAD EXAMIANS APP
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