The height at a point above the earth’s surface at which the wave bends down to the earth is called ______

Distance of separation between transmitter and antenna

Relation between skip distance d, virtual height d and MUF fMUF is ______

\(h=2d\sqrt{[\frac{f_{MUF}^2}{f_c^2}-1]}\)

\(d=2h\sqrt{[\frac{f_{MUF}^2}{f_c^2}-1]}\)

\(h=2d\sqrt{[\frac{f_{MUF}^2}{f_c^2}-1]}\)

\(d=2h(\frac{f_{MUF}^2}{f_c^2}-1)\)

\(h=2d(\frac{f_{MUF}^2}{f_c^2}-1)\)

Explore topic-wise MCQs in Antennas.

This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Antennas knowledge and support exam preparation. Choose a topic below to get started.

1.	Skip zone is distance between the point where the ground wave reception becomes zero and the sky wave returns for the first time.
A.	True
B.	False
Answer» B. False

Discussion

2.	The height at a point above the earth’s surface at which the wave bends down to the earth is called ______
A.	Actual height
B.	Virtual height
C.	Skip distance
D.	Distance of separation between transmitter and antenna
Answer» B. Virtual height

Discussion

3.	Find the virtual height h when the angle of incidence is 600 and distance of separation 120km.
A.	60km
B.	64.34km
C.	34.64km
D.	72.42km
Answer» D. 72.42km

Discussion

4.	The differences in the virtual height and actual height are affected by the electron density in the ionosphere region.
A.	True
B.	False
Answer» B. False

Discussion

5.	Find the skip distance when the angle of incidence is 200 and virtual height is 50km?
A.	13.22m
B.	13.22km
C.	36.33km
D.	36.33m
Answer» D. 36.33m

Discussion

6.	Relation between skip distance d, virtual height d and MUF fMUF is ______
A.	\(d=2h\sqrt{[\frac{f_{MUF}^2}{f_c^2}-1]}\)
B.	\(h=2d\sqrt{[\frac{f_{MUF}^2}{f_c^2}-1]}\)
C.	\(d=2h(\frac{f_{MUF}^2}{f_c^2}-1)\)
D.	\(h=2d(\frac{f_{MUF}^2}{f_c^2}-1)\)
Answer» B. \(h=2d\sqrt{[\frac{f_{MUF}^2}{f_c^2}-1]}\)

Discussion

7.	The effective height of a layer of ionized gas in the atmosphere by which the radio waves are reflected around earth’s curvature is called Virtual height.
A.	True
B.	False
Answer» B. False

Discussion

Explore topic-wise MCQs in Antennas.

Skip zone is distance between the point where the ground wave reception becomes zero and the sky wave returns for the first time.

The height at a point above the earth’s surface at which the wave bends down to the earth is called ______

Find the virtual height h when the angle of incidence is 600 and distance of separation 120km.

The differences in the virtual height and actual height are affected by the electron density in the ionosphere region.

Find the skip distance when the angle of incidence is 200 and virtual height is 50km?

Relation between skip distance d, virtual height d and MUF fMUF is ______

The effective height of a layer of ionized gas in the atmosphere by which the radio waves are reflected around earth’s curvature is called Virtual height.