Antennas & Wave Propagation
JKSSB Sub-Inspector (Telecommunication) · Communication Systems · 14 practice questions with answers and explanations: 2 Easy, 6 Medium, 6 Hard.
Sample questions
Sample Easy question 1
What is the primary function of an 'antenna' in communication systems?
- To transmit and/or receive electromagnetic waves
- To store electrical energy
- To amplify audio signals only
- To convert AC to DC
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Answer: A. Antennas convert electrical signals into electromagnetic waves for transmission, and vice versa for reception.
Sample Medium question 2
What is 'space wave propagation' primarily used for?
- Line-of-sight communication, such as television and FM broadcasting
- Only long-distance shortwave radio
- Only underwater communication
- Only satellite-to-satellite links exclusively
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Answer: A. Space waves travel in a direct line-of-sight path, used for higher-frequency services like TV and FM.
Sample Hard question 3
What does 'antenna gain' refer to?
- A measure of how effectively an antenna directs energy in a particular direction compared to a reference antenna
- The physical size of the antenna
- The cost of the antenna
- The color of the antenna
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Answer: A. Antenna gain quantifies how well an antenna concentrates energy in a specific direction versus a reference.