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Saturday, 15 August 2026
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Physics Past Questions and Answers

Topic: Examples of scalar and vector quantities

Jamb Physics Questions - Examples of scalar and vector quantities

Question 1:
An arrow of mass 0.1kg moving with a horizontal velocity of 15ms-1 is shot into a wooden block of mass 0.4kg lying at rest on a smooth horizontal surface. Their common velocity after impact is
  • A 15.0 ms<sup style='font-size: smaller;'>-1</sup>
  • B 7.5 ms<sup style='font-size: smaller;'>-1</sup>
  • C 3.8 ms<sup style='font-size: smaller;'>-1</sup>
  • D 3.0 ms<sup style='font-size: smaller;'>-1</sup>
View Answer & Explanation
Question 2:
A car of mass 800kg attains a speed of 25m/s in 20 secs. The power developed in the engine is
  • A 1 . 25 x 10<sup style='font-size: smaller;'>4</sup> W
  • B 2 . 50 x 10<sup style='font-size: smaller;'>4</sup> W
  • C 1 . 25 x 10<sup style='font-size: smaller;'>6</sup>W
  • D 2 . 50 x 10<sup style='font-size: smaller;'>6</sup> W
View Answer & Explanation
Question 3:
A certain radioactive source emits radiations that were found to be deflected by both magnetic and electric fields. The radiations are
  • A Beta rays
  • B Gamma rays
  • C X-rays
  • D Unltr-violet rays
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Question 4:
A magnetic field is said to exist at a point if a force is
  • A Exerted on a stationary charge at the point
  • B Exerted on a moving charge at the point
  • C Deflected at the point
  • D Strengthened at the point
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Question 5:
The force on a charge moving with velocity v in a magnetic field B is half of the maximum force when the angle between v and B is
  • A 90<sup style='font-size: smaller;'>o</sup>
  • B 45<sup style='font-size: smaller;'>o</sup>
  • C 30<sup style='font-size: smaller;'>o</sup>
  • D 0<sup style='font-size: smaller;'>o</sup>
View Answer & Explanation