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Physics Past Questions and Answers

Topic: Definition and determination of linear

Jamb Physics Questions - Definition and determination of linear

Question 1:
the ratio of the linear expansivity of copper to that of iron is approximately 1.5. A specimen of iron and a specimen of copper expands by the same amount per unit rise in temperature. The ratio of their length is
  • A 3
  • B 1.5
  • C 1.32
  • D 1
  • E 0.67
View Answer & Explanation
Question 2:
A rod of length 10cm is heated through 100oC and its final length is 10.26cm. What is the co-efficient of linear expansion of the rod?
  • A 0.026 per degree centigrade
  • B 0.00026 per degree centigrade
  • C 0.26 per degree centigrade
  • D 1.0026 per degree centigrade
  • E 0.0026 per degree centigrade
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Question 3:
The expansion of solids can be considered a disadvantage in the
  • A Balance wheel of a watch
  • B Fitting of wheels on rims
  • C Fire alarm
  • D Thermostat
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Question 4:
What is the effect of the increase in the size of the hole of a pin-hole camera on the image? it
  • A Gives a blurred image
  • B Corrects for chromatic aberration
  • C Magnifies the image
  • D Brings the image into a sharper focus
View Answer & Explanation
Question 5:
The sign of the change on a charged glass rod may be determined with
  • A A charged electroscope
  • B An uncharged electroscope
  • C A galvanometer
  • D An electrometer
View Answer & Explanation