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 1681: A block and tackle pulley arrangement has 6 pulleys in which an effort of 50N supports a load of 200N, calculate the efficiency of the machine Options:
  A) 80.0%
  B) 76.6%
  C) 66.7%
  D) 60.7%
  Show Answer
  The correct answer is C .
• Question 1682: The difference observed in solids, liquids and gases can be accounted for by Options:
  A) The different molecules in each of them
  B) The spaces and forces acting between the molecules
  C) Thier melting points
  D) Their relative massess
  Show Answer
  The correct answer is B .
• Question 1683:

  Which of the following thermometers measures temperature from the thermal radiation emitted by objects?

  Options:
  A) Pyrometer thermometer
  B) Platinum resistance thermometer
  C) Thermocouple thermometer
  D) Constant pressure gas thermometer
  Show Answer
  The correct answer is A .
• Question 1684: A simple pendulum has a period of 17.0s. When the length is shorten by 1.5m, its period is 8.5s. Calculate the original length of the pendulum Options:
  A) 4.0 m
  B) 3.0 m
  C) 2.0 m
  D) 1.5 m
  Show Answer
  The correct answer is C .
• Question 1685: The blade of a hoe feel colder to touch in the morning than the wooden handle because the Options:
  A) handle is a better conductor of heat than blade
  B) handle contains stored energy in form of heat
  C) blade is a better conductor of heat than the handle
  D) blade is placed at a lower temperature than the heat
  Show Answer
  The correct answer is C .
• Question 1686: Two forces whose resultant is 100N, are at right angle to each other. If one of them makes an angle 30^o with the resultant, determine its magnitude. Options:
  A) 8.66N
  B) 50.0N
  C) 57.7N
  D) 86.6N
  Show Answer
  The correct answer is D .
• Question 1687:

  

  The current I in the fig above is

  Options:
  A) 4.00A
  B) 1.30A
  C) 0.80A
  D) 0.75A
  Show Answer
  The correct answer is A .
• Question 1688: Two forces A and B act at a point. If their resultant is [given by] (B - A) in the direction of B, then Options:
  A) A and B are equal
  B) A is greater than B
  C) the angle between A and B is 0°
  D) the angle between A and B is 90°
  E) the angle between A and B is 180°
  Show Answer
  The correct answer is E .
• Question 1689: In a resonance tube experiment, if the fundamental frequency of the vibrating air column is 280Hz, the frequency of the third overtone is Options:
  A) 70Hz
  B) 840Hz
  C) 1120Hz
  D) 1960Hz
  Show Answer
  The correct answer is D .
• Question 1690: A radioactive substance has a half-life of 3 minutes. After 9 minutes, the count rate was observed to be 200. What was the count rate at zero time? Options:
  A) 200
  B) 1200
  C) 1600
  D) 2400
  E) 4800
  Show Answer
  The correct answer is C .