A) 20 m
B) 80 m
C) 60 m
D) 40 m
Correct Answer: B
Solution :
4th harmonic \[4\frac{\lambda }{2}=\ell \] \[2\lambda =\ell \] From equation\[\frac{2\pi }{\lambda }=0.157\] \[\lambda =40\] \[\ell =2\lambda \] \[=80m\] Option [b]You need to login to perform this action.
You will be redirected in
3 sec