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Wednesday, 04 November 2026
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Physics Past Questions and Answers

Jamb 2012 Physics Questions

Question 111:
A copper cube weighs 0.25 N in air, 0.17N when completely immersed in paraffin oil and 0.15 N when completely immersed in water.The ratio of upthrust in oil to upthrust in water is
  • A 3 : 5
  • B 4 : 5
  • C 7 : 10
  • D 13 : 10
View Answer & Explanation
Question 112:
A wheel and axle is used to raise a load of 500 N by the application of an effort of 250 N. If the radii of the wheel and the axle are 0.4 cm and 0.1 cm respectively, the efficiency of the machine is
  • A 20 %
  • B 40 %
  • C 50 %
  • D 60 %
View Answer & Explanation