Electromagnetic Field Theory
Radiation intensity in a given direction is the

Power radiated per square metre
Energy radiated per square metre
None of these
Power radiated per unit solid angle in that direction

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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 frequencies below the cut off value the wave progresses across the waveguide after total reflections
Waveguides can handle large power at UHF and microwaves
At waveguide can be coupled to a coaxial cable

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Electromagnetic Field Theory
Which statement does not say that electrostatic field is conservative?

 If the curl of E is identically zero.
 The potential difference between two points is zero.
 The work done in a closed path inside the fields is zero.
 If is gradient of a scalar potential.

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