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Electromagnetic Field Theory

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

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

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Electromagnetic Field Theory
A point pole has a strength of 4π × 10-4 weber. The force in newtons on a point pole of 4π × 1.5 × 10-4 weber placed at a distance of 10 cm from it will be

 20 N.
 7.5 N.
 15 N.
 3.75 N.

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Electromagnetic Field Theory
Plane z = 10 m carries charge 20 C/m2. The electric field intensity at the origin is

 – 72 πuz v/m.
  – 360 πuz v/m.
 – 18 πuz v/m.
 – 10 uz v/m.

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Electromagnetic Field Theory
The minimum height of outer atmosphere is

200 km
100 km
150 km
400 km

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Electromagnetic Field Theory
The static electric field in a conductor is

Infinity
Zero
None of these
Unity

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Electromagnetic Field Theory
When a current carrying conductor is brought into magnetic field, the force that moves the conductor depends upon

The value of current
None of these
The direction of the conductor
The weight of the conductor

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