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 1771: 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 1772: If a car starts from rest and moves with a uniform acceleration of 10ms^-2 for ten seconds, the distance it covers in the last one second of its motion is Options:
  A) 95m
  B) 100m
  C) 500m
  D) 905m
  E) 1000m
  Show Answer
  The correct answer is A .
• Question 1773: Which of the following is NOT an effect that can be produced by an electric current? Options:
  A) heat
  B) light
  C) sound
  D) motion
  E) none of the above
  Show Answer
  The correct answer is E .
• Question 1774: Total internal reflection occurs when light moves from Options:
  A) a dense medium to a less dense medium
  B) air to water
  C) water to glass
  D) a less dense to a dense medium
  Show Answer
  The correct answer is A .
• Question 1775: Calculate the heat energy lost when 10g of boiling water changes to ice at 0°C. [Specific latent heat of ice 336Jg^-1 . Specific heat capacity of water 4.2Jg^-1 K^-1] Options:
  A) 840J
  B) 3360J
  C) 3420J
  D) 4200J
  E) 7560J
  Show Answer
  The correct answer is E .
• Question 1776:

  

  The figure above shows a conductor PQ carrying a current I in the direction shown. At a particular position near the conductor is a compass needle K. Neglecting the earth's magnetic field, the compass needle will

  Options:
  A) settle in any direction
  B) settle in a fixed direction only if the conductor PQ is a magnetic material
  C) settle in a fixed direction WHETHER the conductor PQ is a magnetic material OR NOT
  D) be stationary
  Show Answer
  The correct answer is C .
• Question 1777: Two forces A and B act at a point. If their resultant is [given by] (B - A) in the direction of B, then Options:
  A) A and B are equal
  B) A is greater than B
  C) the angle between A and B is 0°
  D) the angle between A and B is 90°
  E) the angle between A and B is 180°
  Show Answer
  The correct answer is E .
• Question 1778:

  

  In the circuit Shown above, calculate the effective capacitance between X and Y

  Options:
  A) 3/4µF
  B) µ$2\frac{10}{13}\mu F$
  C) 12µF
  D) µ$4\frac{12}{13}\mu F$
  E) 13µF
  Show Answer
  The correct answer is B .
• Question 1779:

  

  In the diagram above , if the magnetic field points into the paper and the force on a current - carrying conductor points upwards, what is the direction of the current?

  Options:
  A) Upwards
  B) Downwards
  C) Right
  D) Left
  Show Answer
  The correct answer is D .
• Question 1780: A cell of internal resistance r supplies current to a 6.0Ω resistor and its efficiency is 75%. Find the value of r. Options:
  A) 4.5Ω
  B) 1.0Ω
  C) 8.0Ω
  D) 2.0Ω
  Show Answer
  The correct answer is D .