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Electromagnetic Field Theory

Electromagnetic Field Theory
If the static magnetic flux density is B, then

 Curl of B = J.
 Divergence of B = J.
  Divergence of B = 0.
 Curl of B = 0.

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

 maximum
None of these
 either 1 or 2
 0

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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

 none of these.
 steady.
 alternating.
 pulsating.

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Electromagnetic Field Theory
Which antenna is a wideband antenna?

Folded dipole
None of these
Marconi antenna
Hertz antenna

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Electromagnetic Field Theory
The potential that appears at a point in space due to the current which caused it is called potential

Retardation
Accelerating
Lagging the current
Oscillating

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Electromagnetic Field Theory
The divergence of a vector is a scalar, while the curl of a vector is another

Scalar
Vector
None of these
Unit vector

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