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A spherometer has 250 equal divisions marked along the periphery of its disc, and one full rotation of the disc advances by 0.0625 cm on the main scale. What is the least count of the spherometer?

Important Questions on Experiments in Physics

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In a vernier callipers, N divisions of vernier scale coincide with N-1 divisions of main scale (in which 1 division represents 1 mm). The least count of the instrument in cm should be
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A vernier caliper have 20 divisions on the vernier scale which coincide with 19 divisions on the main scale. The least count of the instrument is 0.1 mm. The main scale divisions are of
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1 cm on the main scale of vernier calipers is divided into 10 equal parts. If 10 divisions of vernier coincide with 8 small divisions of the main scale, then the least count of the caliper is

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A student measured the diameter of a wire using a screw gauge with least count 0.001 cm and listed the measurements. The correct measurement is:
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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 25th division of circular scale coincides with the reference level. If the screw gauge has a zero error of -0.004 cm, the correct diameter of the ball is