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 1861: The gravitational field intensity at a location X, in space, is two-fifths of its value on the earth’s surface. If the weight of an object at X is 4.80N. what is its weight on the earth? Options:
  A) 1.92N
  B) 2.88N
  C) 6.72N
  D) 8.00N
  E) 12.00N
  Show Answer
  The correct answer is E .
• Question 1862: Two spheres of masses 5.0 kg and 10.0 kg are 0.3 m apart. Calculate the force of attraction between them?
  [G = 6.67 X 10^-11 Nm² Kg²] Options:
  A) 3.50 x 10^-10N
  B) 3.71 x 10^-8 N
  C) 3.57 x 10^-2N
  D) 4.00 x 10²N
  Show Answer
  The correct answer is B .
• Question 1863: 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 1864: 10⁶J of heat is required to boil off completely 2kg of a certain liquid. Neglecting heat lost to the surroundings, the latent heat of vaporization of the liquid is Options:
  A) 2.0 x 10⁶J kg^-1
  B) 5.0 x 10⁶J kg^-1
  C) 2.0 x 10⁵J kg^-1
  D) 5.0 x 10⁵J kg^-1
  Show Answer
  The correct answer is D .
• Question 1865: Calculate the velocity ratio of a screw jack of pitch 0.3cm if the length of the tommy bar is 21cm Options:
  A) $\frac{1}{140}$$\pi$
  B) 14$\pi$
  C) 70$\pi$
  D) 140$\pi$
  Show Answer
  The correct answer is D .
• Question 1866:

  A 35 kΩ is connected in series with a resistance of 40 kΩ. What resistance R must be connected in parallel with the combination so that the equivalent resistance is equal to 25 kΩ?

  Options:
  A) 40 kΩ
  B) 37.5 kΩ
  C) 45.5 kΩ
  D) 30 kΩ
  Show Answer
  The correct answer is B .
• Question 1867:

  If the stress on a wire is 10${}^7$NM${}^{-2}$ and the wire is stretched from its original length of 10.00m to 10.05m. The young'smodulus of the wire is?

  Options:
  A) 5.0 x 10${}^{-4}$Nm${}^{-2}$
  B) 5.0 x 10${}^{-5}$Nm${}^{-2}$
  C) 2.0 x 10${}^{-8}$Nm${}^{-2}$
  D) 2.0 x 10${}^9$Nm${}^{-2}$
  Show Answer
  The correct answer is D .
• Question 1868: Primary colours of light are Options:
  A) Red, blue and green
  B) Cyan, magneta and yellow
  C) Black, blue and green
  D) None of these colours
  Show Answer
  The correct answer is A .
• Question 1869:

  

  In the diagram above a beam of white light travels from a rare to a dense medium. What colours of light do the rays a, b and c respectively represents?

  Options:
  A) red, green and blue
  B) Green, red and blue
  C) Yellow , blue and red
  D) Blue , yellow and red
  Show Answer
  The correct answer is A .
• Question 1870: At low humidity in an environment, the human skin is usually? Options:
  A) damp and rough
  B) damp and smooth
  C) dry and rough
  D) dry and smooth
  Show Answer
  The correct answer is C .