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Wednesday, 04 November 2026
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Physics Past Questions and Answers

Jamb 2006 Physics Questions

Question 21:
If the radius of the earth is 6.4 x 106m, the escape velocity of a satellite from the earth is?
[g = 10 ms-2]
  • A 1.13 x 10<sup style='font-size: smaller;'>4</sup> ms<sup style='font-size: smaller;'>-1</sup>
  • B 9.00 x 10<sup style='font-size: smaller;'>3</sup> ms<sup style='font-size: smaller;'>-1</sup>
  • C 8.00 x 10<sup style='font-size: smaller;'>3</sup> ms<sup style='font-size: smaller;'>-1</sup>
  • D 1.27 x 10<sup style='font-size: smaller;'>4</sup> ms<sup style='font-size: smaller;'>-1</sup>
View Answer & Explanation
Question 22:
The component of vector X along the direction of vector Y is zero when
  • A X and Y are in opposite directions to each other
  • B X is at an angle of 45° to Y
  • C X is perpendicular to Y
  • D X and Y are parallel to each other
View Answer & Explanation
Question 23:
The correct unit of energy density is?
  • A Kg m<sup style='font-size: smaller;'>3</sup> s<sup style='font-size: smaller;'>-2</sup>
  • B Kg m<sup style='font-size: smaller;'>2</sup> s<sup style='font-size: smaller;'>-2</sup>
  • C Kg m<sup style='font-size: smaller;'>-3</sup> s<sup style='font-size: smaller;'>-2</sup>
  • D Kg m<sup style='font-size: smaller;'>-1</sup> s<sup style='font-size: smaller;'>-2</sup>
View Answer & Explanation
Question 24:
I. Work done by load is always less than the work done by effort.
II. All machines are made of levers, pulleys, screws and gear wheels.
III. A fishing rod is a machine.
Iv. Effort is always larger than load.
which of statements above about machines are true?
  • A II and III
  • B III and IV
  • C I and III
  • D II and iv
View Answer & Explanation
Question 25:
The energy associated with the emitted photon when a mercury atom changes from one state to another is 3.3 ev. calculate the frequency of the photon.
[e = 1.6 x 10-19c; h = 6.6 x 10-13js]
  • A 1.3 x 10<sup style='font-size: smaller;'>-15</sup> Hz
  • B 3.1 x 10<sup style='font-size: smaller;'>52</sup> Hz
  • C 3.2 x 10<sup style='font-size: smaller;'>-53</sup> Hz
  • D 8.0 x 10<sup style='font-size: smaller;'>14</sup> Hz
View Answer & Explanation