Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Engineering
  • A radar has a power of 1 Kw and is operating at a frequency of 10 GHz. It is located on a mountain top of height 500 m. The maximum distance upto which it can detect object located on the surface o

A radar has a power of 1 Kw and is operating at a frequency of 10 GHz. It is located on a mountain top of height 500 m. The maximum distance upto which it can detect object located on the surface of the earth (Radius of earth = 6.4 x 106m) is

Option: 1

80 km


Option: 2

16 km


Option: 3

40 km


Option: 4

64 km


Answers (1)

best_answer

Maximum distance on earth where object can be detected is d then

(h+R)^{2}=d^{2}+R^{2}

d^{2}=h^{2}+2Rh

\because \; \; \; h< < R

\therefore \; \; \; d=\sqrt{2Rh}

d=\sqrt{2\times 6.4\times 10^{6}\times 500}=8\times 10^{4}m=80\, km

Posted by

seema garhwal

View full answer

JEE Main high-scoring chapters and topics

Study 40% syllabus and score up to 100% marks in JEE

Similar Questions

Trending Articles/News

anam-khan

BTech aspirant from north-east or UT? Apply for CSAB NEUT counselling 2025 today
anam-khan

JoSAA round 2 cut-off 2025 out; BTech closing ranks for top engineering courses at IITs
anam-khan

Goa Engineering Admission 2025: 1,415 eligible for BE seats; merit list on June 27

Latest Question