JAMB Physics 2015 Objective — Question 33

Question 33 of 50 from the Joint Admissions and Matriculation Board (JAMB) Physics 2015 Objective paper, with the correct answer and a full explanation.

From the diagram, the measuring accuracy of the micrometer screw gauge is

• A. 4.70mm
• B. 4.78mm
• C. 4.66mm
• D. 4.16mmCorrect

Explanation

Main scale reading = 4.0mm; thimble reading = 16×0.01mm = 0.16mm. Total = 4.0+0.16 = 4.16mm.

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