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Electromagnetic Field Theory

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

 Cannot comment.
 False.
 True.
 True partially.

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Electromagnetic Field Theory
A vector field A = p In is given in Cartesian coordinates. In cylindrical coordinates it will be represented as

 A = sinφ Ir.
 A = cosφ Ir - sinφ Ir.
 A = cosφ Ir + sinφ Iφ.
 A = cosφ Ir.

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Electromagnetic Field Theory
If n is the polarization vector and k is the direction of propagation plane electromagnetic wave, then

 n × k = 0.
 n. k = 0.
 n = - k.
 n = K.

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Electromagnetic Field Theory
A coil of 300 turns is wound on a non magnetic core having a mean circumference of 300 mm and a cross sectional area of 300 mm2. The inductance of the coil corresponding to a magnetizing current of 6 A will be

 37.68 μH.
 3.768 μH.
  113.04 μH.
 1.1304 μH.

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Electromagnetic Field Theory
The field at any point on the axis of a current carrying coil will be

 at angle of 45° with the axis.
 perpendicular to the axis.
 parallel to axis.
 zero.

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Electromagnetic Field Theory
The magnitude of force acting on a current carrying conductor placed in a magnetic field is independent of

 length of conductor.
 cross-sectional area of conductor.
 current flowing through the conductor.
 flux density.

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