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Electromagnetic Field Theory

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.
 832.29 N.
 6664.8 N.

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Electromagnetic Field Theory
The work done by a force F = 4un - 3uy + 2uz N in giving a 1nC charge a displacement of (10 ux + 2uy - 7uz) m is

 60 nj.
 100 nj.
 20 nj.
 40 nj.

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Electromagnetic Field Theory
Skin depth is proportional to

 √(σ).
 1/√σ.
 Permeability.
 Frequency.

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Electromagnetic Field Theory
A Yagi antenna has a driven antenna

With one or more directors
With a reflector and one or more directors
Only
With a reflector

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Electromagnetic Field Theory
The electric flux is given D = (2y2 + z) Ix + 4xy Iy + x Iz C/m2. The volume charge density at point (-1, 0, 3) is

 - 2 C/m3.
 - 4 C/m3.
 - 8 C/m3.
 0 C/m3.

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Electromagnetic Field Theory
A potential field is given by V = 3x2 y – yz. The electric field at P(2, -1, 4) is

 12 Ix - 8 Iy V/m.
 12 Ix - 8 Iy - Iz V/m.
 12 Ix + 8 Iy + Iz V/m.
 12 Ix - Iz V/m.

ANSWER DOWNLOAD EXAMIANS APP
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