Minimum length of antenna required to transmit a radio signal of frequency 10 MHz is equal to

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Question: Answered & Verified by Expert

Minimum length of antenna required to transmit a radio signal of frequency

10 MHz

is equal to

PhysicsCommunication SystemJEE Main

Options:

A $8.5 m$
B $6 m$
C $4 m$
D $7.5 m$

Solution:

2873 Upvotes Verified Answer

The correct answer is:

7.5 m

$L_{\min} = \frac{λ}{4}$

$λ = \frac{c}{v}$

$= \frac{3 \times 10^{8}}{10^{7}} = 30 m$

$L_{\min} = 7.5 m$

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