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 311: 10⁶J of heat is required to boil off completely 2kg of a certain liquid. Neglecting heat lost to the surroundings, the latent heat of vaporization of the liquid is Options:
  A) 2.0 x 10⁶J kg^-1
  B) 5.0 x 10⁶J kg^-1
  C) 2.0 x 10⁵J kg^-1
  D) 5.0 x 10⁵J kg^-1
  Show Answer
  The correct answer is D .
• Question 312: The equation P^xV^yT^z = constant in charles' law when Options:
  A) x = 1, y = -1, z = 1
  B) x = 0, y = 1, z = -1
  C) x = 1, y = 0, z = -1
  D) x = 0, y = 1, z = 1
  Show Answer
  The correct answer is B .
• Question 313: 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 314: Calculate the work done in charging a capacitor of capacitance 20µF through a potential difference of 1000V. Options:
  A) 0.02 J
  B) 0.10 J
  C) 0.20 J
  D) 1.00 J
  E) 10.00 J
  Show Answer
  The correct answer is E .
• Question 315: The temperature at which the water vapour present in the air saturates the air and begins to condense is known as Options:
  A) boiling point
  B) melting point
  C) triple point
  D) dew point
  E) critical temperature
  Show Answer
  The correct answer is D .
• Question 316: What is the angle of dip at the magnetic equator Options:
  A) ${45}^{\circ }$
  B) $0^{\circ }$
  C) ${90}^{\circ }$
  D) ${180}^{\circ }$
  Show Answer
  The correct answer is B .
• Question 317: Electric charges on the surface of a conductor would be most evenly distributed if the shape of the conductor is Options:
  A) conical
  B) cubical
  C) cylindrical
  D) parabolic
  E) spherical
  Show Answer
  The correct answer is C .
• Question 318: The total length of a spring when a mass of 20g is hung from its end is 14cm, while its total length is 16cm when a mass of 30g is hung from the same end. Calculate the unstretched length of the spring assuming Hooke's law is obeyed. Options:
  A) 9.33cm
  B) 10.00cm
  C) 10.66cm
  D) 12.00cm
  E) 15.00cm
  Show Answer
  The correct answer is B .
• Question 319: Which of the following is a non-renewable energy source? Options:
  A) Coal
  B) Hydro
  C) Ocean waves
  D) Solar
  E) Tides
  Show Answer
  The correct answer is A .
• Question 320: 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 .