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Electromagnetic Field Theory

Electromagnetic Field Theory
In above question no. 9, the average force on the core to reduce the air gap will be

 832.29 N.
 1666.22 N.
 6664.8 N.
 3332.47 N.

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Electromagnetic Field Theory
________ at a point is defined as the force experienced per unit positive charge at a point placed in the electric field.

 Electric flux.
 Magnetic flux density.
None of these
 Electric intensity.

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

 True partially.
 Cannot comment.
 False.
 True.

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Electromagnetic Field Theory
The energy stored in the magnetic field in a solenoid 30 cm long and 3 cm diameter wound with 1000 turns of wire carrying a current at 10 amp, is

 0.015 joule.
 0.015 joule.
 0.15 joule.
 1.15 joule.

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Electromagnetic Field Theory
A rectangular loop in the x – z plane bounded by the lines x = 0, x = a, z = 0 and z = b is in a time varying magnetic field is given by B = B0 cosωt + ay. Where B0 is constant, ω is angular frequency and ay unit vector in the y direction. Now the emf induced in the loop is given by

  abω Bo sinω t.
 Bo ω sinω t.
 Zero.
 ab Bo cosω t.

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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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