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Thursday, 16 April 2026
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Physics Past Questions and Answers

Jamb 2003 Physics Questions

Question 21:
If the distance from a point source of sound is doubled, by what factor does the intensity decrease?
  • A 4.00
  • B 2.00
  • C 0.50
  • D 0.25
View Answer & Explanation
Question 22:
A 2000W electric heater is used to heat a metal object of mass 5kg initially at 10oC. If a temperature rise of 30oC is obtained after 10min, the heat capacity of the material is
  • A 6.0 x 10<sup style='font-size: smaller;'>4</sup>J<sup style='font-size: smaller;'>o</sup>C<sup style='font-size: smaller;'>-1</sup>
  • B 4.0 x 10<sup style='font-size: smaller;'>4</sup>J<sup style='font-size: smaller;'>o</sup>C<sup style='font-size: smaller;'>-1</sup>
  • C 1.2 x 10<sup style='font-size: smaller;'>4</sup>J<sup style='font-size: smaller;'>o</sup>C<sup style='font-size: smaller;'>-1</sup>
  • D 8.0 x 10<sup style='font-size: smaller;'>4</sup>J<sup style='font-size: smaller;'>o</sup>C<sup style='font-size: smaller;'>-1</sup>
View Answer & Explanation
Question 23:
If 1.2 x 106J of heat energy is given off in 1 sec from a vessel maintained at a temperature gradient of 30Km-1, the surface area of the vessel is
  • A 1.0 x 10<sup style='font-size: smaller;'>2</sup>m<sup style='font-size: smaller;'>2</sup>
  • B 9. 0 x 10<sup style='font-size: smaller;'>2</sup>m<sup style='font-size: smaller;'>2</sup>
  • C 1.0 x 10<sup style='font-size: smaller;'>3</sup>m<sup style='font-size: smaller;'>2</sup>
  • D 9.0 x 10<sup style='font-size: smaller;'>4</sup>m<sup style='font-size: smaller;'>2</sup>
View Answer & Explanation
Question 24:
A positive charged rod X is brought near as uncharged metal sphere Y and is then touched by a finger with X still in place. When the finger is removed, the result is that y has
  • A No charge and a zero potential
  • B A positive charge and zero potential
  • C A negative charge and positive potential
  • D A negative charge and a negative potential
View Answer & Explanation
Question 25:
In the diagram above, if each of the resistors can dissipate a maximum of 18W without becoming excessively heated, what is the maximum power the circuit can dissipate?
  • A 27W
  • B 18W
  • C 9W
  • D 5W
View Answer & Explanation