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JEE Main & Advanced Physics Thermometry, Calorimetry & Thermal Expansion Question Bank Thermometry

  • question_answer
    A centigrade and a Fahrenheit thermometer are dipped in boiling water. The water temperature is lowered until the Fahrenheit thermometer registers 140°. What is the fall in temperature as registered by the Centigrade thermometer [CBSE PMT 1992; AIIMS 1998]

    A)            30°

    B)            40°

    C)            60°

    D)            80°

    Correct Answer: C

    Solution :

               \[\frac{C}{5}=\frac{F-32}{9}\] Þ \[\frac{C}{5}=\frac{(140-32)}{9}\] Þ \[C=60{}^\circ \]


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