A TV transmission tower has a height of 140m and the height of the receiving antenna is 40m. what is the maximum distance upto which signals can be broadcasted from this tower in LOS(Line of sight ) mode? (Given: radius of earth =6.4 |
|||
(a) |
80km |
(b) |
48 km |
(c) |
40km |
(d) |
65 km |
A TV transmission tower has a height of 140m and the height of the receiving antenna is 40m. what is the maximum distance upto which signals can be broadcasted from this tower in LOS(Line of sight ) mode? (Given: radius of earth =6.4 |
|||
(a) |
80km |
(b) |
48 km |
(c) |
40km |
(d) |
65 km |
Maximum distance upto which signal can be broadcasted is :
=
Where are heights of transmitter tower and height of receiver respectively.
Putting all values
On solving, =65km
Potentiometer wire AB having length L and resistance 12 r is jointed to a cell D of emf |
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(a) |
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(b) |
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(c) |
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(d) |
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