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Electromagnetic Field Theory

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

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

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Electromagnetic Field Theory
The inductance of a long solenoid of length 1000 mm wound uniformly with 3000 turns on a cylindrical paper cable of 60 mm diameter is

 3.2 H.
 3.2 mH.
 32 mH.
 3.2 µH.

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Electromagnetic Field Theory
The energy stored in the magnetic field at a solenoid 30 cm long and 3 cm diameter wound with 1000 turns of wire carrying an current at 10 A, is

 1.15 J.
 0.15 J.
 0.5 J.
 0.015 J.

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Electromagnetic Field Theory
An electric field on a place described by its potential V = 20 (r -1 + r-2) where r is the distance from the source. The field is due to

 Both of A and B.
 A monopole.
 A dipole.
 A quardra pole.

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Electromagnetic Field Theory
For a linear electromagnetic circuit, which of the following statement is true?

 Field energy is greater than the co-energy.
 Field energy is lesser than the co-energy.
 Co-energy is zero.
 Field energy is equal to the co-energy.

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Electromagnetic Field Theory
The force on a charge moving with velocity v under the influence of electric and magnetic fields is given by which one of the following

 q(E + V × B).
 q(E + B × V).
 q(E +V × H).
 q(H + V × E).

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