Electromagnetic Field Theory
The magnitude of force acting on a current carrying conductor placed in a magnetic field is independent of

 current flowing through the conductor.
 length of conductor.
 flux density.
 cross-sectional area of conductor.

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Electromagnetic Field Theory
A rectangular waveguide is a

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

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