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Electromagnetic Field Theory

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
An electric dipole of moment P is placed in front of a ground sphere. The change induced on the surface of the sphere is (Assume radius of sphere = R and distance from dipole to centre of sphere = d)

 PR/d.
 Zero.
 PR/d2.
 PR 2/d3.

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Electromagnetic Field Theory
Unit of electric flux density is

 coulomb / meter2.
 coulomb.
 weber / meter2.
 farad / meter.

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Electromagnetic Field Theory
The transmitting antennas for lower frequencies (below 500 kHz) are generally

Horizontal suspended wire type
Parabolic reflector type
Vertical grounded wire type
Any of the above

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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

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

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Electromagnetic Field Theory
In an iron core coil the iron core is removed so that the coil becomes an air core coil. The inductance of the coil will

 increase.
 decrease.
 initially increase and then decrease.
 remain the same.

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MORE MCQ ON Electromagnetic Field Theory

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