Search SchoolNGR

Wednesday, 28 October 2026
Register . Login

Physics Past Questions and Answers

Jamb 1999 Physics Questions

Question 36:
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 37:
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 38:
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 39:
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
Question 40:
The figure above represents a frictionless pulley system in which a weight W is in equilibrium with a weight of 40N. Find the value of W
  • A 13.3N
  • B 20.0N
  • C 40.0N
  • D 80.0N
View Answer & Explanation