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JEE Main & Advanced Physics Simple Harmonic Motion Question Bank Superposition of S H M and Resonance

  • question_answer
     Amplitude of a wave is represented by                    \[A=\frac{c}{a+b-c}\]            Then resonance will occur when                                                    [CPMT 1984]

    A)            \[b=-c/2\]                             

    B)            b = 0 and a = ? c                  

    C)            \[b=-a/2\]                             

    D)            None of these

    Correct Answer: B

    Solution :

                       \[A=\frac{c}{a+b-c};\] when \[b=0\], \[a=c\] amplitude            \[A\to \infty \]. This corresponds to resonance.


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