Electromagnetic Field Theory
Cork Screw rule is used to find

 direction of magnetic field.
 direction of emf.
 direction of electric field.
 direction of current.

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Electromagnetic Field Theory
Which of the following statement regarding waveguides is incorrect?

Waveguides are usually air filled hollow conducting metallic tubes for transmitting UHF and microwaves
At waveguide can be coupled to a coaxial cable
At frequencies below the cut off value the wave progresses across the waveguide after total reflections
Waveguides can handle large power at UHF and microwaves

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