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Question 30163
JEE Physics · Medium

Errors and Measurements: Screw Gauge — JEE Type MCQ

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Screw Gauge — JEE TypeMediumQuestion 30163

Question

A screw gauge has pitch 0.5 mm and 50 circular divisions. What is the LC? If the thimble reads 48 and MSR = 2.5 mm, the reading is:
  1. A
    2.98 mm
    Correct
  2. B
    2.990 mm
  3. C
    2.48 mm
  4. D
    3.48 mm

Correct answer

2.98 mm

Explanation

LC = 0.5/50 = 0.01 mm. Reading = 2.5 + 48×0.01 = 2.5 + 0.48 = 2.98 mm.

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