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Electromagnetic Field Theory

Electromagnetic Field Theory
If a and b are the dimensions of waveguide then

a = 2b
a = 3b
a = b
a = b/4

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Electromagnetic Field Theory
Two point charges (Q and – Q) are situated at the vertex of the square. If potential at another vertex is 2 V, so potential at opposite vertex (diagonally) is

 1 V.
  2 V.
 Zero.
 √ 2 V.

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Electromagnetic Field Theory
A solid sphere made of insulating material has a radius R and has a total charge Q distributed uniformly in its volume. What is the magnitude of electric field intensity, E, at a distance r (o less than r less than R) inside the sphere

 3 Qr/(4 π εo R3).
 Q/(4 π εo r3).
 Qr/(4 π εo R3).
 QR/(4π εo r3).

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Electromagnetic Field Theory
The energy stored in the magnetic field in a solenoid 10 cm long and 4 cm diameter wound with 2000 turns of wire carrying a current at 20 amp, is

 24 joules.
 30 joules.
 15 joules.
 12 joules.

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Electromagnetic Field Theory
A metal surface with 1 meter radius and surface charge density of 20 coulombs / m2 is enclosed in a 10 m side cube. The total outward electric displacement normal to the surface of the cube is

 80π coulombs.
 40π coulombs.
 10π coulombs.
 none of these.

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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

 15 N.
 3.75 N.
 7.5 N.
 20 N.

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MORE MCQ ON Electromagnetic Field Theory

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