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 1791:

  The density of 400cm³ of palm oil was 0.9gcm^-3 before frying. If the density of the oil was 0.6gcm^-3 after frying, assuming no loss of oil due to spilling, its new volume was?

  Options:
  A) 1360cm${}^3$
  B) 600cm${}^3$
  C) 240cm${}^3$
  D) 8000m${}^3$
  Show Answer
  The correct answer is B .
• Question 1792: Which of the following is a derived unit? Options:
  A) Kilogramme
  B) Meter
  C) Kelvin
  D) Newton
  Show Answer
  The correct answer is D .
• Question 1793: As the pressure of a fluid increases, its viscosity Options:
  A) decreases
  B) increases
  C) increases then decreases
  D) remains constant
  Show Answer
  The correct answer is B .
• Question 1794: A plane inclined at angle $\theta$ has a velocity ratio of 10 : 1. The inclination of the plane to the horizontal is given by Options:
  A) tan$\theta$ = $\frac{1}{10}$
  B) cot$\theta$ = $\frac{1}{10}$
  C) cos$\theta$ = $\frac{1}{10}$
  D) sin$\theta$ = $\frac{1}{10}$
  Show Answer
  The correct answer is D .
• Question 1795: A piece of wire gauze can be made to lie on water because Options:
  A) the wire guaze is less dense than water
  B) the water molecules repels the wire guaze upwards
  C) the water surface has the effect of an elastic thin skin
  D) of the cohensive forces between the water and the wire guaze molecules
  Show Answer
  The correct answer is C .
• Question 1796: In copper plating, a current of 0.5A is allowed for cathode area of 100cm². If this current is maintained constant for 100 minutes, the thickness of the copper deposited will be approximately (the electrochemical equivalent of copper = 0.0003g/^oC, density of copper = 10^-4g/cm³ ) Options:
  A) 10^-2mm
  B) 10^-3mm
  C) 10^-4mm
  D) 10^-5mm
  E) 10^-6mm
  Show Answer
  The correct answer is E .
• Question 1797: A man hears his echo from a nearby hill 2s after he shouted. If the frequency of his voice is 260Hz and the wavelength is 1.29m, how far away is the hill? Options:
  A) 330.0m
  B) 335.4m
  C) 660.0m
  D) 670.8m
  Show Answer
  The correct answer is B .
• Question 1798:

  A magnet relay is a device used for?

  Options:
  A) reading the magnitude of magnetic flux
  B) controlling another circuit carrying larger current
  C) turning in sports
  D) storing magnetic field
  Show Answer
  The correct answer is B .
• Question 1799: A beam of light is incident from air to water at an angle of 30^oC. Find the angle of refraction if the refractive index of water is $\frac{4}{3}$ Options:
  A) 15^oC
  B) 18^oC
  C) 22^oC
  D) 24^oC
  Show Answer
  The correct answer is C .
• Question 1800: A force of 100N stretches an elastic string to a total length of 20cm. If an additional force of 100N stretches the string 5cm further, Find the natural length of the string Options:
  A) 15cm
  B) 12cm
  C) 10cm
  D) 8cm
  E) 5cm
  Show Answer
  The correct answer is A .