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Monday, 20 April 2026
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Physics Past Questions and Answers

Topic: Use of Simple beam balance

Jamb Physics Questions - Use of Simple beam balance

Question 1:
A mass of 0.5kg is whirled in a vertical circle of radius 2m at a steady rate of 2 rev/s. Calculate the centripetal force
  • A 164N
  • B 160N
  • C 158N
  • D 172N
View Answer & Explanation
Question 2:
The force required to make an object of mass m, travelling with velocity v, turn in a circle of radius r is
  • A \(\frac{mv^2}{r}\)
  • B \(\frac{mr^2}{v}\)
  • C \(\frac{mr}{v}\)
  • D \(\frac{mv}{r^2}\)
  • E \(\frac{mv}{r}\)
View Answer & Explanation
Question 3:
The net charge on the atom is zero because
  • A The electrons and the protons that are charged are in the nucleus
  • B The total charge on the electrons is equal to the total charge on the protons
  • C The neutrons from a shield around the charged protons
  • D The number of electrons in an atom is half the number of protons
  • E A and B above
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Question 4:
A hydrometer is an instrument for measuring the
  • A Depth of water in a vessel
  • B Relative density of a liquid by the method of flotation
  • C Relative dendity of a liquid by finding the apparent loss in weight
  • D Relative humidity of the air
  • E Atmospheric pressure when the air is humid
View Answer & Explanation
Question 5:
A 10g mass placed on the pan of a spring balance causes an extension of 5cm. If a 15g mass is placed on the pan of the same spring balance, the extension is
  • A 3.3cm
  • B 6.5cm
  • C 7.5cm
  • D 10.8cm
  • E 15.0cm
View Answer & Explanation