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 3 mH 12 mH 48 mH 24 mH 3 mH 12 mH 48 mH 24 mH ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction A laminated iron core has reduced eddy-current losses because The magnetic flux is concentrated in the air gap of the core The laminations are stacked vertically The laminations are insulated from each other More wire can be used with less D.C. resistance in coil The magnetic flux is concentrated in the air gap of the core The laminations are stacked vertically The laminations are insulated from each other More wire can be used with less D.C. resistance in coil ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction The direction of induced e.m.f. can be found by Laplace's law Fleming's right hand rule Kirchhoff s voltage law Lenz's law Laplace's law Fleming's right hand rule Kirchhoff s voltage law Lenz's law ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction Current changing from 8 A to 12 A in one second induced 20 volts in a coil. The value of inductance is 20 H 10 H 5 H 15 H 20 H 10 H 5 H 15 H ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction A crack in the magnetic path of an inductor will result in Unchanged inductance Reduced inductance Increased inductance Zero inductance Unchanged inductance Reduced inductance Increased inductance Zero inductance ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction Which of the following circuit elements will oppose the change in circuit current? Resistance All of the listed here Capacitance Inductance Resistance All of the listed here Capacitance Inductance ANSWER DOWNLOAD EXAMIANS APP
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