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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

 12t.
 12t3.
 4t3.
 24t.

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Electromagnetic Field Theory
A pure inductor is connected across a voltage source. Find the active power drawn by the inductor?

None of these
 either 1 or 2
 maximum
 0

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Electromagnetic Field Theory
Electric field inside a hollow metallic charged sphere is

 none of above.
 decreasing towards centre.
 zero.
 increasing towards centre.

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Electromagnetic Field Theory
The property of the coil by which a counter emf is induced in it when the current through the coil changes is known as

 mutual inductance.
 series aiding inductance.
 self inductance.
 capacitance.

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Electromagnetic Field Theory
The hysteresis loop of a magnetic material has an area of 5 cm2 with the scale given as 1 cm = 2 AT and 1 cm = 50 mwb At 50 Hz; the total hysteresis loss is

 20 W.
  25 W.
 15 W.
 50 W.

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Electromagnetic Field Theory
Which of following is not a unit of flux?

 All of above.
 Weber.
 Telsa.
 Maxwell.

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MORE MCQ ON Electromagnetic Field Theory

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