Explore topic-wise MCQs in Antenna Parameters.

This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Antenna Parameters knowledge and support exam preparation. Choose a topic below to get started.

1.

The radiation resistance dissipates same amount of power as it radiated by the antenna.

A. True
B. False
Answer» B. False
Discussion
2.

Power radiated by half-wave dipole with maximum current amplitude 10A is ______

A. 3.65k
B. 3.650
C. 0.365k
D. 36.50
Answer» B. 3.650
Discussion
3.

What is the radiation resistance of the antenna radiating at 5kW and having maximum current 2A?

A. 25k
B. 2.5k
C. 0.25k
D. 2.5
Answer» C. 0.25k
Discussion
4.

Radiation resistance doesn t depend on direction of power radiated but depends on the frequency.

A. True
B. False
Answer» B. False
Discussion
5.

Find the radiation resistance of a Hertzian dipole of length 1m and operating at a frequency 1MHz?

A. 0.08
B. 8.8m
C. 8.8
D. 0.88
Answer» C. 8.8
Discussion
6.

For a half-wave dipole with length /12, what is the antenna efficiency if the Radiation resistance is 2 ?

A. 0.73
B. 0.073
C. 0.37
D. 0.78
Answer» B. 0.073
Discussion
7.

If the length of the dipole decreases, then the radiation resistance will________

A. increase
B. decrease
C. depends on current distribution
D. not change
Answer» C. depends on current distribution
Discussion
8.

What is the radiation resistance of a short dipole of length L?

A. 20 <sup>2</sup> (( frac{L}{ lambda})^2 )
B. 80 <sup>2</sup> (( frac{l}{ lambda})^2 )
C. 40 <sup>2</sup> (( frac{l}{ lambda})^2 )
D. 160 <sup>2</sup> (( frac{l}{ lambda})^2 )
Answer» B. 80 <sup>2</sup> (( frac{l}{ lambda})^2 )
Discussion
9.

What is the radiation resistance of an antenna if input power to it is 1KW and current in it is 10A having a power loss of 200W?

A. 10
B. 2
C. 12
D. 8
Answer» E.
Discussion
10.

What is the radiation resistance of an antenna if it radiates 1kW and current in it is Irms=10A?

A. 0.1
B. 1
C. 10
D. 100
Answer» D. 100
Discussion