Search SchoolNGR

Wednesday, 28 October 2026
Register . Login

Physics Past Questions and Answers

Jamb 2019 Physics Questions

Question 81:
The part of the human eye that does similar work as the diaphragm of a camera lens is the
  • A Ciliary muscles
  • B Pupil
  • C Iris
  • D Retina
View Answer & Explanation
Question 82:
A projectile of mass 4kg is fired vertically and reaches a maximum height of 1m. Calculate the potential energy at the highest point
(g = 10ms\(^{-2}\)
  • A 1800J
  • B 1600J
  • C 600J
  • D 440J
View Answer & Explanation
Question 83:
The length of the seconds hand of laboratory clock is 0.1m. Calculate the speed at the top of the seconds hand
  • A 1.05 à— 10\(^{-2}\)ms\(^{-1}\)
  • B 1.85 × 10\(^{-4}\)ms\(^{-1}\)
  • C 9.50 à— 10\(^{-1}\)ms\(^{-1}\)
  • D 5.25 à— 10\(^{-3}\)ms\(^{-1}\)
View Answer & Explanation
Question 84:
Workdone on an object to bring it to a certain point in space is called
  • A Gravitational potential energy
  • B Potential energy
  • C Kinetic energy
  • D Mechanical energy
View Answer & Explanation
Question 85:
A copper rod, 5m long when heated through 20c, expands by 1mm. If a second copper rod, 2.5m long is heated through 5c, by how much will it expand?
  • A 4mm
  • B 2mm
  • C 0.25mm
  • D 0.12mm
View Answer & Explanation