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Electromagnetic Field Theory

Electromagnetic Field Theory
In case of all flux from the current in coil 1 links with coil 2, the coefficient of coupling will be

 Zero.
 0.5.
 2.0.
 1.0.

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

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

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Electromagnetic Field Theory
The magnetic field required to reduce the residual magnetism to zero is called

 Hysteresis.
 Coercivity.
 Retentivity.
 Saturation magnetism.

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Electromagnetic Field Theory
In an impedance smith chart, a clockwise movement along a constant resistance circle gives rise to

No change in the reactance value
Decrease in the value of reactance
No change in the impedance value
An increase in the value of reactance

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Electromagnetic Field Theory
The emf induced in a conductor rotating in bipolar field is

 DC and AC both.
 DC.
 AC.
 none of these.

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Electromagnetic Field Theory
As a result of reflection from a plane conducting wall, electromagnetic waves acquire an apparent velocity greater than the velocity of light in space. This is called the

 normal velocity.
 group velocity.
 velocity of propagation.
 phase velocity.

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