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

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Electromagnetic Field Theory
Two identical circular coils, one closed and another is little split (not enclosed) are placed in an uniform magnetic field which decrease at a constant rate. If the plane to the coils are perpendicular to the field which of the following statements is true?

 An emf is induced in both coils.
 Joule heating does not occur in each of the coils.
 An emf is induced in split coil.
 Equal joule heating occurs in both coils.

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Electromagnetic Field Theory
The wave in wave guide has

Larger frequency than in the free space
Group velocity inversely proportional to wavelength
Diminishing wavelength than in the free space
Larger wavelength than in the free space

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