passwella.
Menu

JAMB Physics 1994 Question 1

Question 1

Measurement and Units

What is the reading of the vernier calipers shown above?

Diagram for this question
  1. A.1.79cm
  2. B.1.73cm
  3. C.1.39cm
  4. D.1.34cm
Show the answer and explanation

Answer: C (1.39cm)

Explanation

The vernier zero lies just short of the 1.4 cm mark (main scale 1.3 cm), and the 9th vernier line lines up with a main-scale line, so the reading is 1.3 + 0.09 = 1.39 cm.