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NEET Sample Paper NEET Sample Test Paper-77

  • question_answer
    The source S of unknown frequency produces 8 beats with a source of 250 Hz and 12 beats with a source of 270 Hz. The frequency of source 5 is

    A) 248 Hz             

    B)  258 Hz

    C)  272 Hz                        

    D)  262 Hz

    Correct Answer: B

    Solution :

    The frequency of source \[\operatorname{S}= 270 \pm 12 =282 or 258\] If S have frequency of 258 Hz then it will give 8 beats/s with source of 250 Hz. So, S have frequency 258 Hz.


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