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Electromagnetic Field Theory

Electromagnetic Field Theory
A voltage waveform V(t) = 12t2 is applied across a 1H inductor for t = 0, with initial current through it being zero. The current through the inductor for t = 0 is given by

 4t3.
 12t.
 12t3.
 24t.

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Electromagnetic Field Theory
The magnetic vector potential due to a single conductor carrying current is

 none of tha above.
 infinite.
 zero.
 finite.

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Electromagnetic Field Theory
When a single turn coil rotates in a uniform magnetic field at a uniform speed, the induced emf will be

 steady.
 pulsating.
 alternating.
 none of these.

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Electromagnetic Field Theory
Two coils have inductances L1 = 1200 mH and L2 = 800 mH. They are connected in such a way that flux in the two coils aid each other and inductance is measured to be 2500 mH, then Mutual inductance between the coils is ___________ mH.

 250.
 225.
 145.
 150.

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Electromagnetic Field Theory
A square corner reflector is used in

Point to point communication
Radio astronomy
Tv broadcast
All of these

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Electromagnetic Field Theory
Magnetic flux density emerging out of a closed surface is

 zero.
 depends on magnetic movements outside the closed surface
 infinite.
 depends on magnetic movements inside the closed surface.

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MORE MCQ ON Electromagnetic Field Theory

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