Accuracy of measuring instruments - Jamb Physics Past Questions and Answers

Question 6:

• JAMB 1990

What is the reading of the vernier scale above

A. 1.88cm
B. 1.80cm
C. 1.28cm
D. 1.97cm

Question 7:

• JAMB 1992

What is the least possible error in using a rule graduated in centimeters?

A. 0.1cm
B. 0.5cm
C. 1.0cm
D. 2.0cm

Question 8:

• JAMB 1993

The external and internal diameter of a tube are measured as (32 ± 2)mm and (21 ± 1)mm respectively. Determine the percentage error in the thickness of the tube.

A. 27%
B. 14%
C. 9%
D. 3%