Length of a string tied to two rigid supports is 40 cm
Length of a string tied to two rigid supports is 40 cm. Maximum length (wavelength in cm) of a stationary wave produced on it is
- 20
- 40
- 80
- 120
Answer
When a string is plucked in middle, it vibrates with nodes at end and anti node in middle. Therefore
λ/2 = length
λ = 2 × length = 2 × 40 = 80 cm
The correct option is C.