Question

Standing waves are produced in $10m$ long stretched wire. If the wire vibrates in $5$ segments and wave velocity is $20m/s$, then the frequency is

• A. $2Hz$
• B. $4Hz$
• C. $5Hz$
• D. $10Hz$

Answer 1

Answer: (C)

$5Hz$

Clearly $\lambda =\frac{10}{5}\times 2=4m$
frequency $=\frac{\nu }{\lambda }$
$=\frac{20}{4}$
$=5Hz.$