Physics · 2017
JEE Main · 9 April 2017, Shift 1 · Q28
A signal is to be transmitted through a wave of wavelength λ, using a linear antenna. The length l of the antenna and effective power radiated P_eff…
A signal is to be transmitted through a wave of wavelength $\displaystyle \lambda$, using a linear antenna. The length $\displaystyle l$ of the antenna and effective power radiated $\displaystyle \mathrm{P}_{\text {eff }}$ will be given respectively as :
(K is a constant of proportionality)
Official answer
(1)
$\displaystyle \lambda, \mathrm{P}_{\mathrm{eff}}=\mathrm{K}\left(\frac{1}{\lambda}\right)^2$
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JEE Main 2017 Physics question, with the answer from NTA’s final answer key. Where our answers come from.