Question

In the arrangement shown in Fig. 7.100 , mass can be hung from a string with a linear mass density of `2 xx 10^(-3) kg//m` that passes over a light pulley . The string is connected to a vibrator of frequency `700 Hz` and the length of the string between the vibrator and the pulley is `1 m`.

If the mass suspended is `16 kg` , then the number of loops formed in the string is
A. `1`
B. `3`
C. `5`
D. `8`

Answer 1

Correct Answer - C
Number of loops formed
`P = 2nL sqrt((mu)/(T)) = 2 xx 700 xx 1 sqrt((2 xx 10^(-3))/(16 xx 9.8))`
` = ( 2xx 700)/( 280) = 5`