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 2521: Which radiation is emitted when a beam of fast moving cathode rays is stopped by a heavy element? Options:
  A) Alpha rays
  B) Gamma rays
  C) Positive rays
  D) Ultraviolet rays
  E) X-rays
  Show Answer
  The correct answer is E .
• Question 2522: What is the total electrical energy consumed by using an electric cooker rated 1000W for 5 hrs? Options:
  A) 5.3 x 10³J
  B) 6.5 X 10³J
  C) 1.8 X 10⁷J
  D) 2.3 X 10⁷J
  Show Answer
  The correct answer is C .
• Question 2523:

  

  In the figure above, the work done by the force of 100N inclined at an angle of 60^o to the object dragged horizontally to a distance of 8m is

  Options:
  A) 800J
  B) 600J
  C) 100J
  D) 400J
  Show Answer
  The correct answer is D .
• Question 2524: An atom radiates 1.5 × 10^-19J when an electron jumps from one level to another. What is the wavelength of the emitted radiation? (Planck’s constant 6.6 × l0^-34Js ; Speed of light in vacuum = 3.0 × 108ms^-1) Options:
  A) 1.32 × 10^-6m
  B) 2.97 × 10^-6m
  C) 3.30 × 10^-6m
  D) 6.82 × 10^-6m
  E) 8.01 × 10m^-6
  Show Answer
  The correct answer is A .
• Question 2525:

  Which expression gives magnetic flux?

  Options:
  A) qVB sin$\theta$
  B) $\frac{\mu \varphi I}{2\pi r}$
  C) BA cos $\theta$
  D) -N $\frac{d\varphi }{dt}$
  Show Answer
  The correct answer is C .
• Question 2526: A plane sound wave of frequency 85.5Hz and velocity 342ms^-1 is reflected from a vertical wall. At what distance from the wall does the wave have antinode? Options:
  A) 2m
  B) 4m
  C) 1m
  D) 3m
  Show Answer
  The correct answer is C .
• Question 2527:

  Which of the following will increases the boiling point of water?I. Taking it to a high altitude

  II. Dissolving a salt into it

  III. Heating it in a sealed flask

  IV. Increasing the rate of heat supply.

  Options:
  A) I only
  B) III & IV only
  C) II & III only
  D) II only
  Show Answer
  The correct answer is B .
• Question 2528: A constant force of 40N acting on a body initially at rest gives an acceleration of 0.1ms^-2 for 4s. Calculate the work done by the force Options:
  A) 8J
  B) 10J
  C) 32J
  D) 160J
  Show Answer
  The correct answer is C .
• Question 2529: What is the length of liquid column in a barometer tube that would support an atmospheric pressure of 102000Nm^-2 if the density of the liquid is 2600kgm^-3? [g = 10ms^-2] Options:
  A) 0.75m
  B) 0.76m
  C) 3.92m
  D) 39.23m
  Show Answer
  The correct answer is C .
• Question 2530:

  

  In the diagram, what is the value of W?

  Options:
  A) 5N
  B) 10N
  C) 15N
  D) 20N
  E) 30N
  Show Answer
  The correct answer is B .