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Wednesday, 28 October 2026
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Physics Past Questions and Answers

Jamb 1979 Physics Questions

Question 11:
The heights of the mercury thread in a mercury-in-glass thermometer when in melting ice and then in steam are 3cm and 18cm respectively. At a temperature of 60oC the height would be
  • A 7.5cm
  • B 9cm
  • C 10.8cm
  • D 12cm
  • E 12.6cm
View Answer & Explanation
Question 12:
An object is placed 30cm from a concave mirror of focal length 15cm. the linear magnification of the image produced is
  • A O
  • B \(\frac{2}{3}\)
  • C 1
  • D 2
  • E 3
View Answer & Explanation
Question 13:
If a given mass at constant pressure obeys the relation...volume is proportional to the absolute temperature...the gas is said to obey
  • A Hooke's Law
  • B Boyle's Law
  • C Dalton's Law
  • D Charles' Law
  • E Newton's Law
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Question 14:
A man standing between two parallel mirrors in a barber's shop will see the following number of his own image
  • A Eight
  • B Two
  • C Four
  • D One
  • E Infinite
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Question 15:
Which of the following statements is incorrect? The sensitivity of a galvanometer which incorporates an optical lever arrangement may be increased by providing
  • A A larger number of turns in the coil
  • B A thinner suspension with a small torsional control
  • C A special alloy permanent magnet which gives a high magnetic flux
  • D All of the above
  • E A light source with a greater intensity
View Answer & Explanation