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An antenna uses electromagnetic waves of...

An antenna uses electromagnetic waves of frequency 5 MHz. For proper working, the size of the antenna should be

A

15 km

B

15 m

C

3 km

D

300 m

Text Solution

Verified by Experts

The correct Answer is:
B
(b) : Wavelength `lamda = (3xx10^(8))/(5xx10^(6))` = 60 m
Size of antenna (quarter wave) = `(60)/4 = 15` m
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