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Electromagnetic Field Theory

Electromagnetic Field Theory
Which of the following is zero in relation to electromagnetic fields?

 Div curl A.
 Curl curl A.
 Div grad V.
 Grad div A.

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Electromagnetic Field Theory
A conductor is rotating with in a magnetic field. At which of the positions do the peak voltages occur?

 At right angles to the axis of the magnetic field.
 Anywhere.
 Along the axis of the magnetic field.
 At an angle of 45° to the axis of the magnetic field.

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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.
 1440 μN.
 244 μN.
  1144 μN.

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Electromagnetic Field Theory
If E is the electric field intensity, then what is the value of divergence of (curl of E)?

 Null vector.
 Zero.
 E.
 | E |.

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Electromagnetic Field Theory
Which is the major factor for determining whether a medium is free space, lossless dielectric or a good conductor

 Constitutive parameters.
  Loss tangent.
 Reflector coefficient.
 Attenuation constant.

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Electromagnetic Field Theory
The magnitude of the induced emf in a conductor depends upon on the

 amount of flux linkage.
 amount of flux cut.
 flux density of the magnetic field.
 rate of change of flux linkage.

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