A) 20
B) 80
C) 40
D) 120
Correct Answer: B
Solution :
When the string is plucked in the middle, it vibrates in one loop with nodes at fixed ends and. antinodes in the middle. So that, \[\frac{{{\lambda }_{1}}}{2}=l\] \[{{\lambda }_{1}}=2\times 40=80\,cm\]You need to login to perform this action.
You will be redirected in
3 sec