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Physics Past Questions and Answers

Topic: conduction as mode of heat transfer

Jamb Physics Questions - conduction as mode of heat transfer

Question 11:
A copper rod, 5m long when heated through 20c, expands by 1mm. If a second copper rod, 2.5m long is heated through 5c, by how much will it expand?
  • A 4mm
  • B 2mm
  • C 0.25mm
  • D 0.12mm
View Answer & Explanation
Question 12:
Which of the following materials is a good insulator?
  • A Silver
  • B Water
  • C Rubber
  • D Copper
View Answer & Explanation
Question 13:
A metal sphere is placed on an insulating stand. A negatively charged rod is brought close to it. If the sphere is earthed and the rod is taken away, what will be the charge on the sphere?
  • A The sphere will remain neutral.
  • B The sphere will have a net negative charge.
  • C The sphere will have a net positive charge.
  • D The sphere will become polarized
View Answer & Explanation