Electromagnetic induction Current changing from 8 A to 12 A in one second induced 20 volts in a coil. The value of inductance is 5 H 15 H 10 H 20 H 5 H 15 H 10 H 20 H ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction Air-core coils are practically free from Eddy current losses None of the listed here Hysteresis losses Both Hysteresis losses & Eddy current losses Eddy current losses None of the listed here Hysteresis losses Both Hysteresis losses & Eddy current losses ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction A 200 turn coil has an inductance of 12 mH. If the number of turns is increased to 400 turns, all other quantities (area, length etc.) remaining the same, the inductance will be 48 mH 6 mH 24 mH 12 mH 48 mH 6 mH 24 mH 12 mH 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 inductance of a coil will increase under all the following conditions except When permeability of the core increases When the number of turns of the coil increase When more area for each turn is provided When more length for the same number of turns is provided When permeability of the core increases When the number of turns of the coil increase When more area for each turn is provided When more length for the same number of turns is provided 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 2.5 1.0 2.0 0.5 2.5 1.0 2.0 0.5 ANSWER DOWNLOAD EXAMIANS APP
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