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Electromagnetic Field Theory

Electromagnetic Field Theory
Find the length of a conductor which is moving with a velocity 0.4m/s in a magnetic field of 8T, inducing an emf of 20V.

 0.5m.
 6.25m.
 5.25m.
 0.6m.

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Electromagnetic Field Theory
For DC voltage an inductor is virtually a

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

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Electromagnetic Field Theory
1 Tesla =

 1 wb/m.
 1 wb .
 1 wb/ m2.
 1 wb- m2.

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Electromagnetic Field Theory
A solid sphere made of insulating material has a radius R and has a total charge Q distributed uniformly in its volume. What is the magnitude of electric field intensity, E, at a distance r (o less than r less than R) inside the sphere

 QR/(4π εo r3).
 3 Qr/(4 π εo R3).
 Q/(4 π εo r3).
 Qr/(4 π εo R3).

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Electromagnetic Field Theory
Voltage applied across a dielectric produces an electrostatic field 50 times greater than air. The dielectric constant of the dielectric will be

 10.
 50.
 5.
 20.

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Electromagnetic Field Theory
The force experienced by a current carrying conductor lying parallel to a magnetic field is

 Bil cosθ.
 Bil sinθ.
 BIL.
 zero.

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