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EAMCET Medical EAMCET Medical Solved Paper-1997

  • question_answer
    A clock with an iron pendulum keeps correct time at \[15{}^\circ C\]. If the room temperature rises to \[20{}^\circ C\], the error in seconds per day will be : (coefficient of linear expansion of iron is \[0.000012/{}^\circ C\])

    A)  2.5 s                                     

    B)  2.6 s

    C)  2.4 s                                     

    D)  2.2 s

    Correct Answer: B

    Solution :

                     Error in the clock is given by \[\Delta T=\frac{1}{2}\alpha (\Delta t)\] Now, error in the clock per day will be \[\Delta \Tau =\frac{1}{2}\alpha (\Delta t)86400\] \[=\frac{1}{2}\times 12\times {{10}^{-6}}\times 5\times 86400\] \[=2.59s=2.6\,s\]


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