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Monday, 20 April 2026
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Physics Past Questions and Answers

Topic: Micrometer

Jamb Physics Questions - Micrometer

Question 1:
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
  • A 5.15cm
  • B 5.165cm
  • C 5.0cm
  • D 5.160cm
  • E 5cm
View Answer & Explanation
Question 2:
An object 15cm high is 30cm from pin-hole camera. If the height of the image formed at the back of the camera is 10cm, the image distance is
  • A 20cm
  • B 45cm
  • C 54cm
  • D 63cm
  • E 70cm
View Answer & Explanation
Question 3:
The inside portion of part of a hollow metal sphere of diameter 20cm is polished. The portion will therefore form a
  • A Concave mirror of focal length 5cm
  • B Concave mirror of focal length 10cm
  • C Convex mirror of focal length 5cm
  • D Convex mirror of focal length 20cm
View Answer & Explanation
Question 4:
A positive charged rod X is brought near as uncharged metal sphere Y and is then touched by a finger with X still in place. When the finger is removed, the result is that y has
  • A No charge and a zero potential
  • B A positive charge and zero potential
  • C A negative charge and positive potential
  • D A negative charge and a negative potential
View Answer & Explanation
Question 5:
In measuring high frequency a.c, the instrument used is the
  • A D.c ammeter
  • B Moving coil ammeter
  • C Moving iron ammeter
  • D Hot wire ammeter
View Answer & Explanation