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 1131: An object is placed in front of two plane mirrors inclined at an angle of 0^o. If the total number of images formed is 7, Find the value of $\theta$ Options:
  A) 30^o
  B) 45^o
  C) 51^o
  D) 90^o
  Show Answer
  The correct answer is B .
• Question 1132: The atmospheric pressure due to water is 1.3 x 10⁶Nm^-2. What is the total pressure at the bottom of an ocean 10m deep? [Density of water = 1000kgm^-3, g = 10ms^-2] Options:
  A) 1.3 x 10⁷Nm^-2
  B) 1.4 x 10⁶Nm^-2
  C) 1.4 x 10⁵Nm^-2
  D) 1.0 x 10 ⁵Nm^-2
  Show Answer
  The correct answer is B .
• Question 1133:

  According to kinetic molecular model, in gases

  Options:
  A) The particles are closely packed together, they occupy minimum space and are usually arranged in a regular pattern
  B) The particles occur in clusters with molecules slightly farther apart
  C) The molecule are very fast apart and occupy all the space made available
  D) The particle vibrate about fixed positions and are held together by the strong intermolecular bonds between them
  Show Answer
  The correct answer is C .
• Question 1134: Heat is supplied to a test tube containing 100g of ice at its melting point. The ice melts completely in 1 min.What is the power rating of the source of heat? [Latent heat of fusion of ice = 336Jg^-1] Options:
  A) 336W
  B) 450W
  C) 560W
  D) 600W
  Show Answer
  The correct answer is C .
• Question 1135: Calculate the heat energy lost when 10g of boiling water changes to ice at 0°C. [Specific latent heat of ice 336Jg^-1 . Specific heat capacity of water 4.2Jg^-1 K^-1] Options:
  A) 840J
  B) 3360J
  C) 3420J
  D) 4200J
  E) 7560J
  Show Answer
  The correct answer is E .
• Question 1136: If a room is saturated with water vapour, the temperature of the room must be Options:
  A) at 0^oC
  B) above the dew point
  C) at 100^oC
  D) below or at the dew point
  Show Answer
  The correct answer is D .
• Question 1137: A household refrigerator is rated 200 watts. If electricity costs 5k per kWh, what is the cost of operating it in 20 days? Options:
  A) N4.80
  B) N48.00
  C) N480.00
  D) N4800.00
  Show Answer
  The correct answer is C .
• Question 1138: The speed of light in air is 3 x 10⁸ms^-1. If the refractive index of light from air-to-water is $\frac{4}{3}$, then which of the following is the correct value of the speed of light in water? Options:
  A) 4 x 10⁸ms^-1
  B) 2.25 x 10⁸ms^-1
  C) $\frac{4}{9}$ x 10⁸ms^-1
  D) 2.25 x 10²ms^-1
  E) 4.33 x 10⁸ms^-1
  Show Answer
  The correct answer is B .
• Question 1139:

  The linear expansivity of brass is 2 x 10${}^{-5}$ C${}^{-1}$. If the volume of a piece of brass is 15.00cm at 0°C, what is the volume at 100°C

  Options:
  A) 16.03cm${}^3$
  B) 15.09cm${}^3$
  C) 16.00cm${}^3$
  D) 15.03cm${}^3$
  Show Answer
  The correct answer is B .
• Question 1140:

  

  What is the reading of the vernier scale above?

  Options:
  A) 1.88cm
  B) 1.80cm
  C) 1.28cm
  D) 1.97cm
  Show Answer
  The correct answer is A .