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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

 12t3.
 24t.
 4t3.
 12t.

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Electromagnetic Field Theory
If the resistance of a conductor does not vary in accordance with the Ohms law it is known as

 reverse conductor.
 bad conductor.
 non - conductor.
 non - linear conductor.

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Electromagnetic Field Theory
Which of this statement is not characteristic of a static magnetic field

 it is conservative.
 magnetic flux lines are always closed.
 it is solenoidal.
 it has no sink or sources.

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Electromagnetic Field Theory
The Biot-savarts law is a general modification of

 Kirchhoffs law.
 Lenzs law.
 Amperes law.
 Faradays law.

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Electromagnetic Field Theory
In an inductor current cannot change abruptly. Comment on the statement.

 False.
 True partially.
 True.
 Cannot comment.

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Electromagnetic Field Theory
The transmitting antennas for lower frequencies (below 500 kHz) are generally

Any of the above
Parabolic reflector type
Vertical grounded wire type
Horizontal suspended wire type

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