A geostationary satellite______

A)
is located at a height of 358, 00 km
B)
is motionless in space but keeps spinning
C)
appears stationary over earth's magnetic pole
D)
orbits the earth within a 24 hour period

Correct Answer : Option (D) :   orbits the earth within a 24 hour period

Explanation : It orbits the earth in a 24 hour period. Thus it appears to be stationed over one spot of the globe.

Recently Updated in Communication Systems Questions
In TV scanning sequence of lines is
A)
right to left
B)
left to right
C)
left to right for odd fields and right to left for even field
D)
left to right for even fields and right to left for odd field

Correct Answer :   left to right

Which of the following terms are applicable to troposcatter propagation?
A)
SIOs
B)
Fading
C)
Faradays rotation
D)
Atmospheric storms

Correct Answer :   Fading

Explanation : Tropospheric scatter propagation is subject to two types of fading called Rayleigh fading (due to multipath propagation) and fading due to variations in atmospheric conditions along the propagation path.

A + 1.9 lens has a focal length of 25 mm. The diameter of lens is about
A)
1.3 mm
B)
130 mm
C)
13 mm
D)
None of the above

Correct Answer :   13 mm

ECE MCQ's

Power Electronics
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Radio Receivers
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Microwave Communication
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