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JAMB Physics 1982 Question 3

Question 3

Measurement and Units

One of the following readings represents the measurement of the length of a metal rod using vernier callipers. Taking the reading accuracy into consideration, the most likely one is

  1. A.5.16 cm
  2. B.5.165 cm
  3. C.5.0 cm
  4. D.5.160 cm
  5. E.5 cm
Show the answer and explanation

Answer: A (5.16 cm)

Explanation

Vernier callipers read to 0.01 cm, so a reading has two decimal places in centimetres: 5.16 cm.