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 1231: Light of wavelength 5000 x 10^-8cm travels in free space with a velocity of 3 x 10⁸ms^-1. What is its wavelength in glass of refractive index 1.5? Options:
  A) 3333 x 10^-8cm
  B) 5000 x 10^-8cm
  C) 6666 x10^-8cm
  D) 750010^-8cm
  Show Answer
  The correct answer is A .
• Question 1232: An immersion heater rated 2.0A, 240V is used to boil water from temperature 52°c to 100°c. If the mass of the water is 2.5kg. determine the time taken to boil the water.
  [specific heat capacity of water = 4.2 x 10³ jkg^-1 k^-1] Options:
  A) 1.05 x 10³s
  B) 1.05 x 10⁵s
  C) 1.05 x 10²s
  D) 1.05 x 10⁴s
  Show Answer
  The correct answer is A .
• Question 1233: Which of the following statements are true about the spring balance and the chemical balance? i. both are used to measure the mass of an object. ii. either of them may be used to measure the weight of an object. iii. the spring balance works on the principle of Hooke's law while the chemical balance works on the principle of moments. iv. a change in gravity does the readings of a spring balance but not that of a chemical balance. Options:
  A) i, and iv
  B) ii and iii
  C) ii and iv
  D) i, ii and iii
  E) i and iii
  Show Answer
  The correct answer is C .
• Question 1234: 22,000J of heat is required to raise the temperature of 1.5kg of paraffin from 20^oC to 30^oC. Calculate the specific heat capacity of paraffin. Options:
  A) 1466Jkg^-1oC^-1
  B) 2933Jkg^-1oC^-1
  C) 4400Jkg^-1oC^-1
  D) 5866Jkg^-1oC^-1
  Show Answer
  The correct answer is A .
• Question 1235:

  

  The figure above shows a uniform wood of weight 200N and length 50m. It is pivoted at one end and suspended by a cord at the other end at an angle of 30 degrees to the wood. Calculate the tension in the cord if the wood is horizontal.

  Options:
  A) 10N
  B) 20N
  C) 100N
  D) 200N
  Show Answer
  The correct answer is D .
• Question 1236: All of the following frequencies are overtones of 320 Hz EXCEPT Options:
  A) 960Hz
  B) 640Hz
  C) 520Hz
  D) 1280Hz
  E) 1600Hz
  Show Answer
  The correct answer is C .
• Question 1237: What is the speed of a particle of mass 10^-27kg whose wavelength is 10^-8m.[h = 6.63 x 10^-34Js] Options:
  A) 6.63ms^-1
  B) 66.30ms^-1
  C) 663.00ms^-1
  D) 6630.00ms^-1
  Show Answer
  The correct answer is B .
• Question 1238: The inner diameter of a test tube can be measured accurately using a Options:
  A) micrometer screw guage
  B) pair of dividers
  C) metre rule
  D) pair of vernier calipers
  Show Answer
  The correct answer is D .
• Question 1239:

  What is the name of the model of the atom that describes electrons as orbiting the nucleus in specific energy levels?

  Options:
  A) Bohr model
  B) Dalton model
  C) Rutherford model
  D) Thomson model
  Show Answer
  The correct answer is A .
• Question 1240:

  

  The net capacitance of the circuit shown above is

  Options:
  A) 8.0µF
  B) 6.0µF
  C) 4.0µF
  D) 2.0µF
  Show Answer
  The correct answer is D .