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Electromagnetic Induction

A coil of wire is arranged with its plane perpendicular to a uniform magnetic field o flux density B. when the radius of the coil increases from r1 to r2 in time Δt then what is the emf induced in the coil ?

Electrical Engineering Mcqs, Electromagnetic Induction /
A coil of wire is arranged with its plane perpendicular to a uniform magnetic field o flux density B. when the radius of the coil increases from r1 to r2 in time Δt then what is the emf induced in the coil ?

A. ωB/r22-r12/Δt
B. ωB(r2-r1)2/Δt
C. ωB(r22-r12)/Δt
D. ωB(r22+r12)/Δt

A coil of wire is arranged with its plane perpendicular to a uniform magnetic field o flux density B. when the radius of the coil increases from r1 to r2 in time Δt then what is the emf induced in the coil ? Read More »

Electrical Engineering Mcqs, Electromagnetic Induction

The alternating current has frequency of 106 Hz in such a way that time period for completion of cycle is_______________?

Electrical Engineering Mcqs, Electromagnetic Induction /
The alternating current has frequency of 106 Hz in such a way that time period for completion of cycle is_______________?

A. 1Hzs
B. 1.5Hzs
C. 106sec
D. 1sec

The alternating current has frequency of 106 Hz in such a way that time period for completion of cycle is_______________? Read More »

Electrical Engineering Mcqs, Electromagnetic Induction

If the secondary coil has Ns turns and the primary Np turns the relation between secondary and primary voltages is given by_____________?

Electrical Engineering Mcqs, Electromagnetic Induction /
If the secondary coil has Ns turns and the primary Np turns the relation between secondary and primary voltages is given by_____________?

A. Vs/Vp = Np/Ns
B. Vs/Vp = Ns/Np
C. Vp/Vs = Ns/Np
D. Vp/Vs = Np/Ns

If the secondary coil has Ns turns and the primary Np turns the relation between secondary and primary voltages is given by_____________? Read More »

Electrical Engineering Mcqs, Electromagnetic Induction

A metal rod of 25 cm length is moving at a speed of 0.5/sec in direction perpendicular to 0.25T magnetic field. Emf produced in the rod is_____________?

Electrical Engineering Mcqs, Electromagnetic Induction /
A metal rod of 25 cm length is moving at a speed of 0.5/sec in direction perpendicular to 0.25T magnetic field. Emf produced in the rod is_____________?

A. 0 volt
B. 3.125 volt
C. 31.25 volt
D. 0.03125 volt

A metal rod of 25 cm length is moving at a speed of 0.5/sec in direction perpendicular to 0.25T magnetic field. Emf produced in the rod is_____________? Read More »

Electrical Engineering Mcqs, Electromagnetic Induction

The self-inductance of a solenoid is increased when a soft iron core is inserted into it. This is because the soft iron core_______________?

Electrical Engineering Mcqs, Electromagnetic Induction /
The self-inductance of a solenoid is increased when a soft iron core is inserted into it. This is because the soft iron core_______________?

A. Decreases the resistance of the solenoid
B. Reduces the effect of eddy current
C. Improves the flux linkage between the turns of the coil
D. Increases the mutual inductance between the solenoid and the core

The self-inductance of a solenoid is increased when a soft iron core is inserted into it. This is because the soft iron core_______________? Read More »

Electrical Engineering Mcqs, Electromagnetic Induction