TS EAMCET · Physics · Waves and Sound
A tuning fork 'A' of frequency \(250 \mathrm{~Hz}\) and another tuning fork ' \(B\) ' of frequency ' \(x\) ' produced 5 beats per second when vibrated together. If the fork ' \(B\) ' is waxed and vibrated together with ' \(\mathrm{A}\) ', then 3 beats per second are produced. Then \(\mathrm{x}=\)
- A \(255 \mathrm{~Hz}\)
- B \(245 \mathrm{~Hz}\)
- C \(247 \mathrm{~Hz}\)
- D \(253 \mathrm{~Hz}\)
Answer & Solution
Correct Answer
(B) \(245 \mathrm{~Hz}\)
Step-by-step Solution
Detailed explanation
Tunning fork \(A, f_A=250 \mathrm{H}_2\) Tunning fork \(B, f_B=x\) \[ \begin{aligned} & \left|F_A-F_B\right|=5 \\ & 250-x=5 \\ & x=245 \text { or } 25.5 \end{aligned} \] When it is loaded, it's beat frequency is decreasing by 3 beat/sec. Beat is decreased = frequency increased…
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