A second harmonic has to be generated in a string of length l stretched between two rigid supports. The point where the string has to be plucked and touched are

Options

A. Plucked at `(l)/(4)` and touch at `(l)/(2)`
B. Plucked at `(l)/(4)` and touch at `(3l)/(4)`
C. Plucked at `(l)/(2)` and touched at `(l)/(4)`
D. Plucked at `(l)/(2)` and touched at `(3l)/(4)`

Answer

A

Explanation

Plucking distance
from one end `=(1)/(2n)=(1)/(4)`

and touch distance `=(l)/(2)`.