MHT CET Physics question
The fundamental frequency of a string stretched with a weight 'M' kg is 'n' hertz. Keeping the vibrating length constant, the weight required to produce its octave is [MHT-CET 2022]
Answer: (B)
Solution
The octave has frequency ; since , the weight must be ; M, 2M and 8M are wrong. Hence the correct option is (b).