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  4. An antenna is mounted on a 400 m tall building. What will be the wavelength of signal of signal that can be radiated effectively by the transmission tower upto a range of 44 km ?

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Q. An antenna is mounted on a $400 \,m$ tall building. What will be the wavelength of signal of signal that can be radiated effectively by the transmission tower upto a range of $44 \,km$ ?

JEE MainJEE Main 2021Communication Systems

Solution:

$h$ : height of antenna
$\lambda$ : wavelength of signal
$h <\lambda$
$\lambda> h$
$\lambda>400\, m$