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Friday, 22 May 2026
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Physics Past Questions and Answers

Jamb 1999 Physics Questions

Question 36:
2311Na + Proton → pqX + alpha particle
What are the values of p and q respectively in the equation above?
  • A 10 and 20
  • B 12 and 24
  • C 20 and 10
  • D 24 and 12
View Answer & Explanation
Question 37:
A semiconductor diode is used in rectifying alternating current into direct current mainly because it
  • A Allows current to flow in either direction
  • B Is non-linear
  • C Offers a high input resistance
  • D Allows current to flow only in one direction
View Answer & Explanation
Question 38:
if ∆x is the uncertainty in the measurement of the position of a particle along the x-axis and ∆Px is the uncertainty in the measurement of the linear momentum along the x-axis, then the uncertainty principle relation is given as
  • A ∆x ∆P<sub style='font-size: smaller;'>x</sub> ≥ h
  • B ∆x ∆P<sub style='font-size: smaller;'>x</sub> = 0
  • C ∆x ∆P<sub style='font-size: smaller;'>x</sub> < h
  • D ∆x ∆P<sub style='font-size: smaller;'>x</sub> = âˆÅ¾
View Answer & Explanation
Question 39:
If ∆x is the uncertainty in the measurement of the position of a particle along the x-axis and ∆Pa is the uncertainty in the measurement of the linear momentum along the x-axis, then the uncertainty principle relation is given as
  • A ∆x ∆P<sub style='font-size: smaller;'>x</sub> ≥ h
  • B ∆x ∆P<sub style='font-size: smaller;'>x</sub> = 0
  • C ∆x ∆P<sub style='font-size: smaller;'>x</sub> < h
  • D ∆x ∆P<sub style='font-size: smaller;'>x</sub> = âˆÅ¾
View Answer & Explanation
Question 40:
The diagram above shows the velocity-time graph of a vehicle. Its acceleration and retardation respectively are
  • A 8.0 ms<sup style='font-size: smaller;'>-2</sup>, 4,0 ms<sup style='font-size: smaller;'>-2</sup>
  • B 4.0 ms<sup style='font-size: smaller;'>-2</sup>, 8.0 ms<sup style='font-size: smaller;'>-2</sup>
  • C 4.0 ms<sup style='font-size: smaller;'>-2</sup>, 2.0 ms<sup style='font-size: smaller;'>-2</sup>
  • D 2.0 ms<sup style='font-size: smaller;'>-2</sup>, 4.0 ms<sup style='font-size: smaller;'>-2</sup>
View Answer & Explanation