The height of a TV transmitting antenna is $20 m$ . The telecast can cover a radius of

8 k m

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16 k m

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32 k m

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64 k m

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Solution

The correct option is B $16 k m$
$d_{m a x} = \sqrt{2 R H_{T}} H_{T} = 20 m \Rightarrow d_{m a x} = \sqrt{\frac{2 \times 6400 \times 20}{1000}} = 16 k m$

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What should be the approximate height of antenna if the TV telecast is to cover a radius of 100 km?

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