If sound waves of frequency 20 KHz are to be transmitted directly, then the length of the dipole antenna required is

Question

If sound waves of frequency 20 KHz are to be transmitted directly, then the length of the dipole antenna required is

If sound waves of frequency 20 KHz are to be transmitted directly, then the length of the dipole antenna required is
A. 3.75 km
B. 15 km
C. 7.5 km
D. 20 km

Monjur Alahi

5 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - C
`lambda=c/f=(3xx10^8)/(20xx10^3) =15xx10^3` m = 15 km
`therefore` the required length of the antenna `=lambda/2`=7.5 km

5 views Answered 2023-02-05 15:29