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NEET NEET SOLVED PAPER 2018

  • question_answer
    A student measured the diameter of a small steel ball using a screw gauge of least count 0.001 cm. The main scale reading is 5 mm and zero of circular scale division coincides with 25 divisions above the reference level. If screw gauge has a zero error of -0.004 cm, the correct diameter of the ball is [NEET - 2018]

    A)  0.053 cm                   

    B)  0.525 cm

    C)  0.521 cm                   

    D)  0.529 cm

    Correct Answer: D

    Solution :

    Diameter of the ball \[\text{=MSR+CSR }\!\!\times\!\!\text{ (Least count)--Zero error}\] \[\text{=0}\text{.5 cm+25 }\!\!\times\!\!\text{ 0}\text{.001--(--0}\text{.004)}\] \[=0.5+0.025+0.004\] \[\text{=0}\text{.529 cm}\]


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