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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 m).

(a)

80km

(b)

48 km

(c)

40km

(d)

65 km


Question ID - 50236 :-

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 m).

(a)

80km

(b)

48 km

(c)

40km

(d)

65 km

1 Answer
5876 Votes
3537

Answer Key : (d) -

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



Next Question :

Potentiometer wire AB having length L and resistance 12 r is jointed to a cell D of emf  and internal resistance r, A cell C having emfε/2 and internal resistance 3r is connected. The length AJ at which the galvanometer as shown in fig. shows no deflection is

             

(a)

L

(b)

L

(c)

L

(d)

L


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