A vertical wire of 1 meter length carries a current of 1 A at 10 MHz. The total radiated power is nearly

Electronics and Communication Engineering (ECE) : Electromagnetic Field Theory - Quiz(MCQ)

0.13 W

0.88 W

7.3 W

73 W

Correct Answer : Option (C) : 73 W

Explanation :

P = I² . R => (1)² . 73 => 73 watt.

Here, vertical wire will be considered as dipole.

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Radiation intensity in a given direction is the

Energy radiated per square metre

Power radiated per square metre

Power radiated per unit solid angle in that direction

None of the above

Correct Answer : Power radiated per unit solid angle in that direction

Which of the following impedance inversion is obtained?

Balun transformer

A quarter wave line

Short-circuited stub

A half wave line

Correct Answer : A quarter wave line

The wave in wave guide has

Larger frequency than in the free space

Diminishing wavelength than in the free space

Group velocity inversely proportional to wavelength

Larger wavelength than in the free space

Correct Answer : Larger wavelength than in the free space