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Electromagnetic Field Theory

Electromagnetic Field Theory
When a conductor moves in the field, so that it makes an angle 8 with the lines of flux, the force F is given as : F = Bl sin2 0.

No
Yes

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Electromagnetic Field Theory
Two straight parallel conductors carry equal currents in opposite direction. The force between them is

 none of above.
 repulsive.
 zero.
 attractive.

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Electromagnetic Field Theory
For DC voltage an inductor is virtually a

 depends on magnitude of voltage.
 short circuit.
 open circuit.
 depends on polarity.

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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

 75 V.
 25 V.
 50 V.
 100 V.

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Electromagnetic Field Theory
A circular loop has its radius increasing at a rate of 2 m/s. The loop placed perpendicular to a constant magnetic field of 0.5 wb/m2. When the radius of the loop is 4 m. the emf induced in the will be

 0.4 π V.
 Zero.
 8 π V.
 0.8 π V.

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Electromagnetic Field Theory
The electric flux is given D = (2y2 + z) Ix + 4xy Iy + x Iz C/m2. The volume charge density at point (-1, 0, 3) is

 - 4 C/m3.
 - 8 C/m3.
 - 2 C/m3.
 0 C/m3.

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