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 431: The particle nature of light is demonstrated by the Options:
  A) photoelectric effect
  B) speed of light
  C) colours of light
  D) diffraction of light
  Show Answer
  The correct answer is A .
• Question 432:

  An open-tube mercury manometer is used to measure the pressure in a gas tank. When the atmospheric pressure is 101,325 $P_a$, what is the absolute pressure in $P_a$ in the tank if the height of the mercury in the open tube is 25 cm higher. density of mercury = $13600kg/m^3,g=9.8m/s^2$

  Options:
  A) 108,986 Pa
  B) 165,238 Pa
  C) 122,364 Pa
  D) 134,645 Pa
  Show Answer
  The correct answer is D .
• Question 433: The magnification of the image of an object placed in front of a convex mirror is $\frac{1}{3}$. If the radius of curvature of the mirror is 24cm, what is the distance between its object and its image? Options:
  A) 8cm
  B) 16cm
  C) 24cm
  D) 32cm
  Show Answer
  The correct answer is D .
• Question 434: A block of ice floats on water inside a container. If the block of ice gets completely melted, the level of water in the container will Options:
  A) increase
  B) remain the same
  C) decrease
  D) first decrease and then increase
  Show Answer
  The correct answer is B .
• Question 435:

  The lower fixed part of a faulty thermometer reads 2°C while the upper fixed point is 100°C.

  What is the true temperature when the thermometer reads 51°C?

  Options:
  A) 52°C
  B) 50°C
  C) 49°C
  D) 46°C
  Show Answer
  The correct answer is B .
• Question 436:

  Calculate the mass of ice that would melt when 2kg of copper is quickly transferred from boiling water to a block of ice without heat loss (specific heat capacity of copper = 400Jkg${}^1$k${}^{-1}$, latent heat of fusion of ice = 3.3 x 10${}^5$Jkg${}^{-1}$)

  Options:
  A) $\frac{8}{33}$kg
  B) $\frac{3.3}{80}$kg
  C) $\frac{80}{33}$kg
  D) $\frac{3.3}{8}$kg
  Show Answer
  The correct answer is A .
• Question 437: Tea pots are often silver-coated to prevent heat loss by Options:
  A) conduction only
  B) convention only
  C) convection and conduction
  D) radiation only
  Show Answer
  The correct answer is D .
• Question 438: During electrolysis, 2.0 g of a metal is deposited using a current of 0.5 A in 3 hours. The mass of the same metal which can be deposited using a current of 1.5 A in 1 hour is? Options:
  A) 1.0 g
  B) 0.5 g
  C) 3.0 g
  D) 2.0 g
  Show Answer
  The correct answer is D .
• Question 439:

  

  The correct position for a fuse in the diagram above is

  Options:
  A) between P and Q
  B) Q
  C) S
  D) P
  Show Answer
  The correct answer is D .
• Question 440:

  

  In the figure above, a lever of length 200m is used to lift a load of mass 180kg. The pivot at P is 20m from the load. what minimum force F must be applied at the end of the lever [g = 10ms^-2]

  Options:
  A) 9N
  B) 18N
  C) 20N
  D) 200N
  Show Answer
  The correct answer is D .