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Electromagnetic Field Theory
A square corner reflector is used in which of the following?
Point-to-point communication
Radio astronomy
TV broadcast
All of these
Point-to-point communication
Radio astronomy
TV broadcast
All of these
Answer
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Related Question
Electromagnetic Field Theory
Parabolic and lens antenna used at
Low frequency
Microwave frequency
High frequency
Medium frequency
Low frequency
Microwave frequency
High frequency
Medium frequency
Answer
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Electromagnetic Field Theory
The transmitting antennas for lower frequencies (below 500 kHz) are generally
Parabolic reflector type
Horizontal suspended wire type
Any of the above
Vertical grounded wire type
Parabolic reflector type
Horizontal suspended wire type
Any of the above
Vertical grounded wire type
Answer
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Electromagnetic Field Theory
The critical frequency of ‘F’ layer is greater than 30 MHz.
True
False
True
False
Answer
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Electromagnetic Field Theory
Which of the following is multiband HF receiving antenna?
Conical horn
Folded dipole
Square loop
Log-periodic
Conical horn
Folded dipole
Square loop
Log-periodic
Answer
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Electromagnetic Field Theory
If E is the electric field intensity, then what is the value of divergence of (curl of E)?
Null vector.
E.
| E |.
Zero.
Null vector.
E.
| E |.
Zero.
Answer
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