WAEC Physics 2017 Objective — Question 2
Question 2 of 50 from the West African Examinations Council (WAEC) Physics 2017 Objective paper, with the correct answer and a full explanation.
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Which of the following instruments is the best for measuring the diameter of a thin constantan wire?
- A. A. Callipers
- B. B. Metre rule
- C. C. Micrometer screw gaugeCorrect
- D. D. Vernier callipers
Explanation
The micrometer screw gauge is used to measure the diameter of a wire or anything less than that. Its reading accuracy is 0.01mm or 0.001cm. It is more accurate than the Vernier calliper.
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