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 731:

  A body of mass 4 kg resting on a smooth horizontal plane is simultaneously acted upon by two perpendicular forces 6N and 8N. Calculate the acceleration of the motion.

  Options:
  A) 2.5 ms^-2
  B) 3.0 ms^-2
  C) 4.0 ms^-2
  D) 4.5 ms^-2
  Show Answer
  The correct answer is A .
• Question 732:

  I. Work done by load is always less than the work done by effort.

  II. All machines are made of levers, pulleys, screws and gear wheels.

  III. A fishing rod is a machine.

  Iv. Effort is always larger than load.

  which of statements above about machines are true?

  Options:
  A) I and III
  B) III and IV
  C) I and III
  D) II and III
  Show Answer
  The correct answer is C .
• Question 733: How many grams of water at 17^oC must be added to 42g of ice at 0^oC to melt the ice completely? [specific latent heat of fusion of ice = 3.4 x 10⁵Jkg^-1, specific heat capacity of water = 4200Jkg^-1k^-1] Options:
  A) 200g
  B) 300g
  C) 320g
  D) 400g
  Show Answer
  The correct answer is A .
• Question 734: Which of the following gas laws is equivalent to the work done? Options:
  A) Boyle' law
  B) Charles law
  C) Pressure law
  D) van der Waal's law
  Show Answer
  The correct answer is A .
• Question 735:

  Determine the value of x from the nuclear reaction below:

  ${}_{86}^{222}Rn$ → ${}_{88}^{x}Ra$ + 2β + energy

  Options:
  A) 220
  B) 222
  C) 224
  D) 226
  E) 228
  Show Answer
  The correct answer is B .
• Question 736: What part of a camera functions in a similar way to the retina of the eye? Options:
  A) diaphragm
  B) film
  C) focusing ring
  D) lens
  E) shutter
  Show Answer
  The correct answer is B .
• Question 737:

  One of the features of the fission process is that

  Options:
  A) it leads to chain reaction
  B) its products are not radioactive
  C) neutrons are not released
  D) the of the masses of the reactants equals the sum of the masses of the products
  Show Answer
  The correct answer is A .
• Question 738: An electric kettle with negligible heat capacity is rated at 2000W. If 2.0kg of water is put in it, how long will it take the temperature of water to rise from 20^OC to 100^OC? [specific heat capacity of water = 4200Jkg^-1k^-1] Options:
  A) 420S
  B) 336S
  C) 168S
  D) 48S
  Show Answer
  The correct answer is B .
• Question 739: When a telescope is in normal use, the final image is at Options:
  A) Infinity
  B) The focus
  C) The radius of curvature
  D) The near point
  Show Answer
  The correct answer is A .
• Question 740: What are the units of thermal conductivity? Options:
  A) kg.m.sec²
  B) Joule sec^-1m^-1k^-1
  C) kg.m
  D) Newton sec^-1m²
  E) m³
  Show Answer
  The correct answer is B .