JEE Main & Advanced
Physics
Communication System / संचार तंत्र
JEE PYQ-Communication System
question_answer
Long range radio transmission is possible when the radio waves are reflected from the ionosphere. For this to happen the frequency of the radio waves must be in the range: [JEE ONLINE 19-04-2014]
A)80 - 150 MHz
B)8 - 25 MHz
C)1 - 3 MHz
D)None of these
Correct Answer:
D
Solution :
Frequency of radio waves for sky wave propagation is 2 MHZ to 30 MHZ.