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Electromagnetic Field Theory

Electromagnetic Field Theory
A conductor of length 1 metre moves at right angles to magnetic field of flux density 1 Wb/m2 with a velocity of 25 m/s. The induced emf in the conductor will be

 25 V.
 75 V.
 100 V.
 50 V.

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Electromagnetic Field Theory
A negative point charge q = - 40 nC is moving with velocity of 6 × 106 m/s in a direction specited by unit vector uy + 0.6 uz. Find the magnitude of force vector on the moving particle by the field B = 2 ux + 3 uy + 5 uz mT and E = 2 ux - 3 uy + 5 uz KV/m

  1144 μN.
 1440 μN.
 144 μN.
 244 μN.

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Electromagnetic Field Theory
When the phase velocity of an EM wave depends on frequency in any medium the phenomenon is called

Absorption
Polarisation
Dispersion
Scattering

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Electromagnetic Field Theory
The lagging of flux density behind the applied magnetising force is known as

All of these
 permeance.
 hysteresis.
 flux.

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Electromagnetic Field Theory
The critical frequency of ‘F’ layer is greater than 30 MHz.

True
False

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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
 0
 either 1 or 2
 maximum

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