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Wednesday, 04 November 2026
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Physics Past Questions and Answers

Jamb 2012 Physics Questions

Question 81:
Ice cubes are added to a glass of warm water. The glass and water are cooled by
  • A Conduction only
  • B Convection only
  • C Conduction and convection
  • D Convection and radiation
View Answer & Explanation
Question 82:
A ray of light strikes a plane mirror at an angle of incidence of 35°. If the mirror is rotated through 10°, through what angle is the reflected ray rotated?
  • A 70°
  • B 45°
  • C 25°
  • D 20°
View Answer & Explanation
Question 83:
The terrestrial telescope has one extra lens more than the astronomical telescope. The extra lens is for
  • A Improving the sharpness
  • B Creating an inverted image
  • C Magnification of the image
  • D Erection of the image
View Answer & Explanation
Question 84:
The driving mirror of a car has a radius of curvature of 1m. A vehicle behind the car is 4m from the mirror. Find the image distance behind the mirror.
  • A 8/7
  • B 4/9
  • C 9/2
  • D 4/7
View Answer & Explanation
Question 85:
The pressure of a given mass of a gas changes from 200Nm-2 to 120Nm-2 while the temperature drops from 127°C to -73°C. The ratio of the final volume to the initial volume is
  • A 2 : 5
  • B 5 : 4
  • C 5 : 2
  • D 4 : 5
View Answer & Explanation