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 1241: Determine the focal length of a thin converging lens if the power is 5.0 dioptres Options:
  A) 0.1 m
  B) 0.2 m
  C) 2.0 m
  D) 2.5 m
  Show Answer
  The correct answer is B .
• Question 1242: An object of mass 20kg is released from a height of 10m above the ground level. The kinetic energy of the object just before it hits the ground is Options:
  A) 200J
  B) 4000J
  C) 2000J
  D) 500J
  Show Answer
  The correct answer is C .
• Question 1243:

  

  E, F and G are yellow, red and cyan transparent light filters respectively. The color of a white opaque object when viewed through the arrangement of the filters above is

  Options:
  A) yellow
  B) red
  C) black
  D) blue
  Show Answer
  The correct answer is C .
• Question 1244:

  

  A uniform bean HK of length 10m and weighing 200N is supported at both ends as shown above. A man weighing 1000N stands at a point P on the beam. If the reactions at point H an K respectively are 800N and 400N, Then the distance HP is

  Options:
  A) 4m
  B) 3.5m
  C) 3m
  D) $6\frac{2}{3}$m
  E) 7m
  Show Answer
  The correct answer is C .
• Question 1245: Which of the following pairs of colours gives the widest separation in the spectrum of white light? Options:
  A) Red and Violet
  B) Green and Yellow
  C) Red and Indigo
  D) Yellow and Violet
  Show Answer
  The correct answer is A .
• Question 1246: The note produced by a stretched string has a fundamental frequency of 400Hz. If the length of the string is doubled while the tension in the string is increased by a factor of 4, the frequency is Options:
  A) 200Hz
  B) 400Hz
  C) 800Hz
  D) 1600Hz
  Show Answer
  The correct answer is B .
• Question 1247: A train has an initial velocity of 44ms^-1 and an acceleration of -4ms^-1. Its velocity after 10 seconds is Options:
  A) 2ms^-1
  B) 4ms^-1
  C) 8ms^-1
  D) 12ms^-1
  E) 16ms^-1
  Show Answer
  The correct answer is B .
• Question 1248: Which of the following affects the period of a simple pendulum? i. mass of the pendulum bob. ii. length of the pendulum. iii. acceleration due to gravity. Options:
  A) i, ii, and iii
  B) ii and iii only
  C) i and iii only
  D) i and ii only
  Show Answer
  The correct answer is B .
• Question 1249:

  Which of the following statements is not true?

  Options:
  A) The mechanical advantage of a smooth inclined plane depends on the ratio of the length to the height of the plane.
  B) The efficiency of an inclined plane decreases as the slope increases.
  C) The effort required to push a given load up an inclined plane increases as the slope increases.
  D) As the slope of an inclined plane increases, the velocity ratio decreases.
  Show Answer
  The correct answer is A .
• Question 1250:

  

  In the figure above W1 = 200g, and W2 =450g . Calculate the extension of the spring per unit load? [g = 10ms^-2]

  Options:
  A) 6.0 x 10^-5mN^-1
  B) 2.5 x 10^-4mN^-1
  C) 6.0 x 10 ^-3mN^-1
  D) 2.5 x 10 ^-2mN^-1
  Show Answer
  The correct answer is C .