Physics Exam Past Questions and Answers | JAMB, WAEC and NECO

Physics is the science that studies the nature and properties of matter and energy. It covers topics like motion, heat, light, sound, electricity, magnetism, and the structure of atoms.

• Question 161:

  The sensitivity of a thermometer is

  Options:
  A) All of the above
  B) how quickly a temperature change can be detected
  C) the difference between the maximum and the minimum temperature
  D) the smallest temperature change that can be detected or measured
  Show Answer
  The correct answer is D .
• Question 162: If a tube of small radius opened at both ends is placed in a liquid, the liquid will Options:
  A) remain at the same level irrespective of whether the liquid wet the glass or not
  B) fall below the liquid level if the liquid wets the glass
  C) falls below the liquid level if the liquid does not wet the glass
  D) rise above the liquid level if the liquid does not wet the glass
  Show Answer
  The correct answer is C .
• Question 163:

  

  From the diagram above, the bob of the pendulum has the fastest speed at

  Options:
  A) X
  B) Y
  C) Z
  D) W
  Show Answer
  The correct answer is A .
• Question 164:

  Calculate the gravitation force of attraction between two planets of 10²⁴kg and 10²⁷kg separated by a distance of 10²⁰meters.

  Options:
  A) 6.67N
  B) 6.56N
  C) 7.5N
  D) 8.6N
  Show Answer
  The correct answer is A .
• Question 165: A working electric motor takes a current of 1.5 A when the p.d across it is 250V. If its efficiency is 80%, the power output is Options:
  A) 300.0W
  B) 469.0W
  C) 133.0W
  D) 4.8W
  Show Answer
  The correct answer is A .
• Question 166: If u is the object distance and v the image distance, which of the following expressions gives the linear magnification produced by a convex lens of focal length f? Options:
  A) ^u/_f - f
  B) ^u/_v + f
  C) ^v/_f + 1
  D) ^v/_f - 1
  Show Answer
  The correct answer is D .
• Question 167: Under constant tension and constant mass per unit length, the note produced by a plucked string is 500Hz when the length of the string is 0.90m. At what length is the frequency 150Hz? Options:
  A) 3m
  B) 4m
  C) 5m
  D) 6m
  Show Answer
  The correct answer is A .
• Question 168: The falling of light energy on a metal such that electrons are liberated from the metal is called Options:
  A) electron effect
  B) metal electron effect
  C) metal emission
  D) photoelectric effect
  E) photoemission
  Show Answer
  The correct answer is E .
• Question 169:

  Which of the following is NOT a limitation of experimental measurements?

  Options:
  A) Systematic error
  B) Instrument resolution
  C) Random errors
  D) Human error
  Show Answer
  The correct answer is B .
• Question 170: The image in a pin-hole camera is Options:
  A) errect and formed by refraction through a lens
  B) virtual and formed by dispersion
  C) erect and gets sharper as the hole becomes larger
  D) inverted and formed by the light from each point travelling in a straight line
  Show Answer
  The correct answer is D .