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Question 30158
JEE Physics · Medium

Errors and Measurements: Instrument Selection MCQ

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Instrument SelectionMediumQuestion 30158

Question

To measure the thickness of a thin metal sheet (~0.5 mm) most accurately, the best instrument is:
  1. A
    Metre rule
  2. B
    Vernier caliper (LC = 0.1 mm)
  3. C
    Screw gauge (LC = 0.01 mm)
    Correct
  4. D
    Tape measure

Correct answer

Screw gauge (LC = 0.01 mm)

Explanation

For thin sheets where measurements are in fractions of a millimetre, the screw gauge with LC = 0.01 mm provides the best precision.

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