Satellite Communication MCQ | Pdf
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Important points to remember (Satellite Communication MCQ)
- Communication satellites represent more than half of the satellites that orbit the Earth and are responsible for distributing telephone, internet, and TV signals.
- They are nothing more than repeater stations for telecommunications signals, that is, they pick up signals sent from one point on our planet and relay them to another point on the Earth’s surface.
- The communication satellite is used as an alternative means of transmission, to supply the deficiencies of the terrestrial infrastructure, as we mentioned at the beginning.
- Communication in remote locations and without terrestrial telecommunications infrastructure would be impossible without satellites.
- Satellites essentially function as signal repeaters, picking up and relaying signals from one point to another on Earth.
- The satellite communication system includes a communication repeater and a communication antenna. The transponder is the core of the communication satellite.
- Generally, the frequency conversion method is used, that is, the received 4GHz uplink signal is converted into a 6GHz downlink signal, and the 11GHz uplink frequency is converted into a 14GHz downlink. The antenna is the import and export of radio waves.
- According to the requirements, it can be made into antennas with different shapes and sizes of beam coverage areas, such as global beams, regional beams, domestic beams, and spot beam antennas.
- The communication system amplifies and converts the received signal sent by the earth station to the satellite and then sends it to the earth to realize satellite communication.
1. The astronaut in a satellite, moving in a circular orbit around the earth, experiences a feeling of weightlessness because____
(a) the gravitational force acting on the astronaut is zero.
(b) acceleration due to the gravity of the earth is zero
(c) the astronaut is in an inertial frame of reference
(d) the floor of the satellite does not produce any reaction on the astronaut
Answer : D
2. The plane of the circular orbit of a satellite passes through_____
(a) south pole
(b) north pole
(c)the center of the earth
(d) the latitude of 600
3. The apparent weight of a man standing in a lift is more than his real weight when the lift______
(a) goes down with an acceleration
(b) goes down with a uniform speed
(c) goes up with a uniform acceleration
(d) goes up with a uniform speed
4. The weight of an astronaut in an artificial satellite revolving around the earth is_______
(a) equal to that on the earth
(b) less than that on the earth
(d) more than that on the earth
5. A communication satellite of the earth travels from_____
(a) North to the south in the polar plane
(b) East to west in the equatorial plane
(c) West to the east in the equatorial plane
(d) South to the north in the polar plane
7. A satellite is moving around the earth in a stable circular orbit. Which one of the following statements will be wrong for such a satellite?
(a) It is moving at a constant speed.
(b) Its angular momentum remains constant
(c) It is acted upon by a force directed away from the center of the earth which counterbalances the gravitational pull of the earth.
(d) It behaves as if it were as freely falling
8. Two satellites X and Y are moving in a circular orbit of radii r and 2r respectively, around the same planet. What is the ratio of their critical velocities?
(a) 1 : √2
(c) √2: 1
9. A satellite is rotating in a circular orbit around the earth with a speed equal to half the magnitude of escape velocity from the earth. The height of the satellite above the earth’s surface is______
10. The period of revolution of a satellite is_______
(a) independent of the mass of a satellite
(b) depends on the mass of a satellite
(c) independent of the radius of the orbit
(d) independent of the radius of the earth
11. A geostationary satellite of the earth____
(a) has a period of 12 hours
(b) is stationary in space
(c) revolves from west to east in the equatorial plane
(d) revolves from east to west in the equatorial plane
12. The periodic time of a simple pendulum inside a satellite orbiting around the earth is_____
Answer : D
13. The weight of a person in a lift accelerating downwards______
(b) becomes zero
(d) does not change
14. Square of the period of a satellite is______
(a) directly proportional to the radius of its orbit
(b) directly proportional to the cube of the radius of its orbit
(c) inversely proportional to the radius of its orbit
(d) inversely proportional to the square of the radius of the orbit
15. The period of revolution of planet A around the Sun is 8 times that of B. How many times the distance of A from the Sun is greater than that of B from the Sun?
16. A geostationary satellite has an orbital period of_______
(a) 6 hours
(b) 12 hours
(c) 18 hours
(d) 24 hours
17. When a lift is moving up with a uniform speed of I m/s. the weight of a man recorded by a weighing machine in the lift is 70 kg. If the lift starts moving down with a uniform speed of 2 m/s, the weight of the man recorded by the weighing machine will be________
(a) 72 kg
(b) 70 kg
(c) 68 kg
(d) 75 kg
18. The radius of the earth is 6400 km and g = 10 m/secs. So that a body of mass 5 kg weighs zero, at the equator, the angular speed of the earth should be_______
(a) radian/ sec.
(b) 1/800 radian/ sec.
(c) 1/200 radian/ sec.
(d) 1/400 radian/ sec.
19. A satellite that is geostationary in a particular orbit is taken to another orbit, the distance of which is twice that of the earlier orbit. The periodic time of the satellite in the second orbit is______
(a) 24 hours
(b) 48 hours
(c) 48√2 hours
(d) 48/√2 hours
20. An artificial satellite makes 8 revolutions in 72 hours. How many revolutions a geostationary satellite will make at the same time?
21. A satellite is orbiting around the earth at a mean radius of 16 times that of the geostationary orbit. What is the period of the satellite?
(a) 64 days
(b) 32 days
(c) 16 days
(d) 8 days
22. Which is the correct statement regarding a satellite?
(a) A satellite cannot move in a stable orbit if its plane passes through the center of the earth
(b) Two geostationary satellites are sufficient for communication around the globe
(c) Geostationary satellites are launched in the equatorial plane and are made to move from west to east
(d) the speed of the satellite increases with an increase in the radius of the orbit.
23. The orbits of Geostationary satellites are_____
24. The variation in the speeds of the planets in their orbits about the sun can be explained on a basis. of the conservation of______
(a) Total energy
(b) Liner momentum
(c) Kinetic energy
(d) Angular momentum
Answer : D
24. The minimum number of geostationary satellites needed for uninterrupted global communication
25. Satellites situated at a height of approximately 42000 from the center of the earth of a radius of 6400 km are mainly used______
(a) for navigation
(b) for weather forecasting
(c) for global communication
(d) as space stations in the journey to the moon
26. Coaxial cables can carry_____
(a) only digital signals
(b) only analog signals
(c) both digital and analog signals
(d) neither digital nor analog signals
27. For point to point communication, we require_______
(a) any medium
(b) only a guided medium
(c)only an unguided medium
(d) only vacuum
28. Transmission lines start radiating____
(a) at low frequencies
(b) at high frequencies
(c) at both high and low frequencies
(d) at infrasonic frequencies
29. The moon is______
(a) an active satellite
(b) a natural passive satellite
(c) an artificial passive satellite
(d) a partly active and partly passive satellite
30. In the case of transmission lines, maximum power is transferred to the load, if the characteristics impedance of transmission line______ the impedance at the (receiver end).
(a) is equal to
(b) is more than
(c) is less than
(d) is the square root of
31. The satellite communication earth station communicates through the forwarding of the communication satellite over the equator. Depending on the latitude of the earth station, the one-way space distance of one hop is 72000～km______
32. The satellite communication system includes a communication repeater and_____________
C. Communication Antenna
D. base station
33. Satellite communication network is divided according to the service area of the satellite, including ( ) and domestic satellite communication network.
A. International Satellite Communication Network
B. Regional Satellite Communication Network
C. Analog communication network
D. Both A and B
34. The terminal equipment of the communication satellite earth station refers to the equipment with functions such as ( ) in the earth station equipment.
A. Baseband Signal Processing
B. Multiplexing and tapping
C. modulation and demodulation
D. All of these
35. Communication satellites can transmit information such as television.
C. fax and data
D. All of these
36. Communication satellites are divided according to their operating orbits.
A. Low-orbit satellite
B. High-orbit satellite
C. Geostationary satellite
D. Both A and C
37. Communication satellite telemetry, remote control and tracking system consists of transponder__________
A. Telemetry Device
B. Remote control device
C. Measurement and control antenna
D. All of these
38. Communication satellite energy system, also known as power system, consists of_________
A. Solar array
B. battery pack
C. power supply circuit
D. All of these
Hope this satellite communication MCQ will helpful for your exams. MCQ on satellite communication is an important topic in physics on which definitely one to two questions come in the exam. We also provide satellite communication MCQ with answers in pdf format, and geostationary satellite MCQ with Answers.