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Wednesday, 28 October 2026
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Physics Past Questions and Answers

Jamb 1978 Physics Questions

Question 6:
An ice cube floats in a glass of water filled to the brim. What happens when the ice melts?
  • A The water level remains the same
  • B There is a drop in the level of water in the glass due to condensation on its outside
  • C The water in the glass overflows
  • D The level of water drops because melted ice occupies less volume
  • E None of the above is correct
View Answer & Explanation
Question 7:
A machine gun with a mass of 5kg fires a 50g bullet at speed of 100ms-1. The recoil speed of the machine gun is
  • A 0.5 msec<sup style='font-size: smaller;'>-1</sup>
  • B 1.5 msec<sup style='font-size: smaller;'>-1</sup>
  • C 1 msec<sup style='font-size: smaller;'>-1</sup>
  • D 2 msec<sup style='font-size: smaller;'>-1</sup>
  • E 4 msec<sup style='font-size: smaller;'>-1</sup>
View Answer & Explanation
Question 8:
mercury is a better barometric fluid than water because i. it needs no colouring ii. its density is many times greater than that of water iii. it does not wet glass iv. it has a high vapour pressure v. it has a high boiling point. which of the above statements are true?
  • A I and ii only
  • B I, ii and iii only
  • C Iii and iv only
  • D Iv and v only
  • E Iii, iv and v only
View Answer & Explanation
Question 9:
The internationally agreed system of units(SI) for physical measurements are
  • A Ib, ft, sec
  • B G, m, sec
  • C Kg, m, sec
  • D Cm, g, sec
  • E Kg, cm, sec
View Answer & Explanation
Question 10:
To determine the weight of an object you could
  • A Use a beam balance
  • B Use a spring balance
  • C Find the force necessary
  • D Use none of these methods
  • E Use any of these methods
View Answer & Explanation