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 271: If 8 x 10^-2J of work is required to move 100$\mu$C of charge from a point X to a point Y in an electrical circuit, the potential difference between X and Y is Options:
  A) 4.0 x 10² v
  B) 4.0 x 10⁴ v
  C) 8.0 x 10² v
  D) 8.0 x 10² v
  Show Answer
  The correct answer is C .
• Question 272:

  During the transformation of matter from the solid to the liquid state, the heat supplied does not produce temperature increase because

  Options:
  A) all the heat is used to break the bonds holding the molecules of the solid together
  B) the heat capacity has become very large as the substance melts
  C) the heat energy is quickly conducted away
  D) the heat gained is equal to the heat lost by the substance
  Show Answer
  The correct answer is A .
• Question 273: When the brakes in a car are applied, the frictional force force on the tyres is Options:
  A) is a disadvantage because it is in the direction of the motion of the car
  B) is a disadvantage because it is in the opposite direction of the motion of the car
  C) is an advantage because it is in the direction of the motion of the car
  D) is an advantage because it is in the opposite direction of the motion of the car
  Show Answer
  The correct answer is D .
• Question 274:

  The electrolyte used in the Nickel-Iron (NiFe) accumulator is

  Options:
  A) dilute tetraoxosulphate(VI) acid
  B) barium chloride solution
  C) potassium hydroxide solution
  D) sodium hydroxide solution
  Show Answer
  The correct answer is C .
• Question 275: A bob of weight 0.1 N hangs from a massless string of length 50 cm. A variable horizontal force which increase from zero is applied to pull the bob until the string makes an angle of 60^o with the vertical. The work done is Options:
  A) 0.500 J
  B) 0.250 J
  C) 0.050 J
  D) 0.025 J
  Show Answer
  The correct answer is D .
• Question 276: In a certain fusion reaction, a deuteron (${}_1^{2}H$) interacts with a triton (${}_1^{3}He$) and produces an a-particle (${}_2^{4}He$) and a second product. The second product is Options:
  A) a proton
  B) an electron
  C) a neutron
  D) a gamma ray
  Show Answer
  The correct answer is C .
• Question 277: When 100g of liquids L₁ at 78^oC was mixed with Xg of liquid L₂ at 50^oC, the final temperature was 60^oC. Given that the specific heat capacity of L₂is half that of L₁, find x Options:
  A) 50g
  B) 100g
  C) 150g
  D) 200g
  Show Answer
  The correct answer is C .
• Question 278: Which of the following is NOT a force? Options:
  A) Friction
  B) Tension
  C) Upthrust
  D) Weight
  E) Impulse
  Show Answer
  The correct answer is E .
• Question 279: When the volume of a given mass of gas is halved and its temperature doubled, the pressure Options:
  A) remains constant
  B) increases by a factor of 4
  C) increases by a factor of 3
  D) decreases by a factor of 4
  Show Answer
  The correct answer is B .
• Question 280:

  The differences observed in solids, liquids and gases may be accounted for by

  Options:
  A) their relative masses
  B) their melting points
  C) the spacing and forces acting between the molecules
  D) the different molecules in each of them
  Show Answer
  The correct answer is C .