CUET Preparation Today
What will be the minimum length of antenna required to transmit a radio signal of frequency 10 MHz? |
30 m 15 m 7.5 m 60 m |
7.5 m |
The correct answer is Option (3) → 7.5 m The wavelength (λ) of a radio wave is - $λ=\frac{c}{v}$ v = frequency = $10×10^6Hz$ $∴λ=\frac{3×10^8}{10×10^6}=30m$ $L_{min}=\frac{λ}{4}=\frac{30}{4}=7.5m$ |
