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 141: A cube of side 10cm and mass 0.5kg floats in a liquid with only $\frac{1}{5}$ of its height above the liquid surface. What is the relative density of the liquid? Options:
  A) 0.125cm^-1
  B) 0.250gcm^-1
  C) 0.625cm^-1
  D) 2.500cm^-1
  Show Answer
  The correct answer is C .
• Question 142: An object which is 3cm high is placed vertically 10cm in front of a concave mirror. If this object produces an image 40cm from the mirror, the height of the image is Options:
  A) 0.75cm
  B) 4.00cm
  C) 8.00cm
  D) 12.00cm
  Show Answer
  The correct answer is D .
• Question 143: Power supply is transmitted at a very high voltage and low current in order to Options:
  A) make pass through the trasformers
  B) increase the power supply
  C) make it travel fast
  D) prevent overheating of the coil
  Show Answer
  The correct answer is D .
• Question 144: If the velocity ratio of a machine is 5. What is its ratio of x and y? Options:
  A) 2 : 5
  B) 1 : 5
  C) 5 : 1
  D) 3 : 1
  Show Answer
  The correct answer is C .
• Question 145: A narrow beam of white light can be split up into different colours by a glass prism. The correct explanation is that Options:
  A) white light is an electromagnetic wave
  B) the prism has all the colours of the white light
  C) white light has undergone total internal reflection in the prism
  D) different colours of white light travel with different speeds in glass
  E) white ligth consist of yellow, green and red colours
  Show Answer
  The correct answer is D .
• Question 146: The speed of light in air is 3 x 10⁸ms^-1. What is the speed in glass with a refractive index of 1.50? Options:
  A) 1.5 x 10⁸ms^-1
  B) 3.0 x 10⁸ms^-1
  C) 2.0 x 10⁸ms^-1
  D) 6.0 x 10⁸ms^-1
  Show Answer
  The correct answer is C .
• Question 147:

  A bar magnet is divided into two pieces, which of the following statement is correct?

  Options:
  A) two new magnets are created
  B) the magnetic field of each separate piece becomes stronger
  C) the electric field is created
  D) the bar magnet is demagnetized
  Show Answer
  The correct answer is A .
• Question 148:

  The differences observed in solids, liquids and gases may be accounted for by

  Options:
  A) their relative masses
  B) their melting points
  C) the spacing and forces acting between the molecules
  D) the different molecules in each of them
  Show Answer
  The correct answer is C .
• Question 149:

  I. Density of the liquid.

  II. Acceleration due to gravity.

  III. Type of container of the liquid.

  IV. The constituents of the liquid.

  Which of the above conditions will NOT affect the pressure of fluid?

  Options:
  A) I and III only
  B) II and III only
  C) III and IV only
  D) I and II only
  Show Answer
  The correct answer is C .
• Question 150: What type of electromagnetic radiation can be used to take photographs in the haze? Options:
  A) Radio waves
  B) infrared rays
  C) Visible light
  D) Gamma rays
  Show Answer
  The correct answer is B .