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Electromagnetic Field Theory

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

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

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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.
 Zero.
 ab Bo cosω t.
 Bo ω sinω t.

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Electromagnetic Field Theory
1 Maxwell is the same as

 10-8 weber.
 10-8 weber.
 10-4 weber.
 104 weber.

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Electromagnetic Field Theory
The coils having self inductance of 10 mH and 15 mH have an effective inductance of 40 mH, when connected in series aiding. What will be the equivalent inductance if we connect then in series opposing?

 0 mH.
  10 mH.
 20 mH.
 5 mH.

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Electromagnetic Field Theory
Electric flux in coulombs emanating from any surface of a cube containing C coulombs of charge at its centre is

 4πQ / 6ε.
 Q / 4π.
 Q / 6.
 Q / 6ε.

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Electromagnetic Field Theory
A sphere of 20 cm radius contains electrical charge of density 2/(r sinθ) c/m3. What is the total charge contained within the sphere?

 0.335/sinθ c.
 0.335 C.
 0.
 None of above.

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MORE MCQ ON Electromagnetic Field Theory

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