Radio Horizon MCQs

Practice Radio Horizon MCQs with four options, answers and explanations for focused Electronics & Telecommunication Engineering revision.

Question 1

Antenna & Wave PropagationRadio Horizon

Using the common radio-horizon approximation d(km)≈4.12(sqrt(ht)+sqrt(hr)) with heights in metres, two antennas each 25 m high have a radio line-of-sight distance of approximately?

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Correct Answer: B. 41.2 km

Explanation: sqrt(25)=5, so d≈4.12(5+5)=41.2 km.

Reference: Standard antenna and wave propagation: radio horizon

Question 2

Antenna & Wave PropagationRadio Horizon

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Correct Answer: C. 61.8 km

Explanation: d≈4.12(sqrt100+sqrt25)=4.12(10+5)=61.8 km.

Reference: Standard antenna and wave propagation: radio horizon