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 71: A man standing between two parallel mirrors in a barber's shop will see the following number of his own image Options:
  A) eight
  B) two
  C) four
  D) one
  E) infinite
  Show Answer
  The correct answer is E .
• Question 72: When taking a penalty kick, a footballer applies a force of 30.0N for a period of 0.05s. if the mass of the ball is 0.075kg, calculate the speed with which the ball moves off. Options:
  A) 4.50ms^-1
  B) 11.25ms^-1
  C) 20.00ms^-1
  D) 45.00ms^-1
  Show Answer
  The correct answer is C .
• Question 73: An object is weighted at different locations on the earth. What will be the right observation? Options:
  A) Both the mass and weight are constant
  B) Both the mass and weight vary
  C) the mass is constant while the weight varies
  D) the weight is constant while the mass varies
  Show Answer
  The correct answer is C .
• Question 74:

  The half life of a radioactive material is 12 days. Calculate the decay constant.

  Options:
  A) 0.8663 $da{y}^{-1}$
  B) 0.04331 $da{y}^{-1}$
  C) 0.17325 $da{y}^{-1}$
  D) 0.05775 $da{y}^{-1}$
  Show Answer
  The correct answer is D .
• Question 75:

  In a radioactive series:

  ${}_{92}^{235}L{\to }_{93}^{235}M{\to }_{90}^{235}N{\to }_{90}^{235}\varphi$

  The particles emitted are respectively

  Options:
  A) $\beta \beta \alpha$
  B) $\alpha \gamma \beta$
  C) $\gamma \alpha \beta$
  D) $\alpha \alpha \beta$
  E) $\beta \alpha \beta$
  Show Answer
  The correct answer is C .
• Question 76:

  

  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.

  Options:
  A) 13.3N
  B) 20.0N
  C) 40.0N
  D) 80.0N
  Show Answer
  The correct answer is C .
• Question 77: If the maximum voltage across a 100ohms resistor is 20V, then the maximum power it can dissipate is Options:
  A) 5.00W
  B) 4.00W
  C) 2.00W
  D) 25W
  Show Answer
  The correct answer is B .
• Question 78: The extension in a spring when 5g wt was hung from it was 0.56cm. If Hooke's law is obeyed, What is the extension caused by a load of 20g wt? Options:
  A) 1.12m
  B) 2.14cm
  C) 2.52cm
  D) 2.80cm
  E) 2.24cm
  Show Answer
  The correct answer is E .
• Question 79: What is the speed of a body vibrating at 50 cyclic per second Options:
  A) 100 πrads${}^{-1}$
  B) 200 πrads${}^{-1}$
  C) 50 πrads${}^{-1}$
  D) 400 πrads${}^{-1}$
  Show Answer
  The correct answer is A .
• Question 80: Volatile liquids usually Options:
  A) Have high boiling points
  B) have low boiling points
  C) have high densities
  D) have high melting points
  Show Answer
  The correct answer is B .