Question

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

(a) 20 

(b) 80 

(c) 40

(d) 120

Answer 1

Correct Option (b) 80

Explanation:

When the string is plucked in the middle, it vibrates in one loop with nodes at fixed ends and an antinode in the middle.