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Monday, 02 November 2026
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Physics Past Questions and Answers

Jamb 1984 Physics Questions

Question 21:
Which of the following statements describes an atom accurately? i. atoms of all elements are identical ii. an atom contains a nucleus and number of electrons iii. due to the electrons in the atom an atom is negatively charged iv. electrons in the atom move in circular orbits round the nucleus
  • A I and ii
  • B Ii and iii
  • C Iii and iv
  • D Ii and iv only
  • E I,ii and iii
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Question 22:
A particle moves in a circular orbit of radius 0.02m. If the speed of the particle is 0.88ms-1, calculate its frequency in cycles per second
  • A 2.0Hz
  • B 7.0Hz
  • C 8.8Hz
  • D 14.0Hz
  • E 17.6Hz
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Question 23:
Heat is supplied uniformly at the rate of 100W to 1.0 x 10-2kg of a liquid for 20 seconds. If the temperature of the liquid rises by 5oC, then the specific heat capacity of the liquid is
  • A 2.0 x 10<sup style='font-size: smaller;'>2</sup>Jkg<sup style='font-size: smaller;'>-1</sup>k<sup style='font-size: smaller;'>-1</sup>
  • B 2.0 x 10<sup style='font-size: smaller;'>2</sup>Jkg<sup style='font-size: smaller;'>-1</sup>
  • C 4.0 x 10<sup style='font-size: smaller;'>4</sup>Jkg<sup style='font-size: smaller;'>-1</sup>k<sup style='font-size: smaller;'>-1</sup>
  • D 4.0 x 10<sup style='font-size: smaller;'>4</sup>kg<sup style='font-size: smaller;'>-1</sup>
  • E 8.4 x 10<sup style='font-size: smaller;'>3</sup>Jkg<sup style='font-size: smaller;'>-1</sup>k<sup style='font-size: smaller;'>-1</sup>
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Question 24:
A given mass of an ideal gas occupies a volume V at a temperature T and under a pressure p. If the pressure is increased to 2p and the temperature reduced to \(\frac{1}{2T}\), then the percentage change in the volume of the gas is
  • A 0%
  • B 25%
  • C 75%
  • D 300%
  • E 400%
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Question 25:
Which of the following properties of matter CANNOT be utilized for temperature measurement? The
  • A Length of a liquid column
  • B Volume of a gas at constant pressure
  • C Pressure of a gas at constant volume
  • D Resistance of a metallic wire
  • E Current produced in a photoelectric effect
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