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

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Electromagnetic Field Theory
A rectangular waveguide is a

Rectangular conducting wire to propagate electromagnetic waves
Hollow rectangular walled room carrying electromagnetic wave
Tube antenna to transmit and receive electromagnetic waves
Hollow rectangular conducting tube through which electromagnetic waves can be propagat-ed

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