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 71: Vapour is said to be saturated on top of an enclosed liquid if _________ Options:
  A) The rate of condensation is greater than that of vapourization
  B) The rate of condensation is equal to that of vapourization
  C) There is neither condensation nor vaporization of the liquid
  D) The rate of condensation is less that that of vaporization
  Show Answer
  The correct answer is B .
• Question 72: The gravitational field intensity at a location X, in space, is two-fifths of its value on the earth’s surface. If the weight of an object at X is 4.80N. what is its weight on the earth? Options:
  A) 1.92N
  B) 2.88N
  C) 6.72N
  D) 8.00N
  E) 12.00N
  Show Answer
  The correct answer is E .
• Question 73:

  A siren having a ring of 200 hole makes 132 rev/min. A jet of air is directed on the set of holes. Calculate the frequency and wavelength in air of the note produced (take v = 350m/s)

  Options:
  A) 0.875m
  B) 0.625m
  C) 0.335m
  D) 0.125m
  Show Answer
  The correct answer is A .
• Question 74: A waterfall is 6.30m high. What is the change in temperature of a quantity of water that falls from the top to the bottom of the waterfall? (Neglect heat losses to the surroundings, take g as 10 ms^-2 and specific heat capacity of weather as 4200,J kg^-1K^-1 Options:
  A) 0.15°C
  B) 1.50°C
  C) 15.00°C
  D) 21.00 °C
  E) 50.00°C
  Show Answer
  The correct answer is B .
• Question 75: The instrument used for securing a large number of similar charges by induction is called Options:
  A) electrophorus
  B) capacitor
  C) proof-plane
  D) electroscope
  Show Answer
  The correct answer is A .
• Question 76: If a container is filled with ice to the brim, what happens to the level of water when the ice completely melts? Options:
  A) the level of water goes up
  B) the water in the glass outflows
  C) the level of water remains unchanged
  D) the level of water drops
  Show Answer
  The correct answer is D .
• Question 77: Ripples on water and light waves are similar because both Options:
  A) have the same frequency
  B) can be refracted and diffracted
  C) are longitudinal waves
  D) have the same velocity
  Show Answer
  The correct answer is C .
• Question 78: If light with photon energy 2eV is incident suitably on the surface of a metal with work function 3eV, then Options:
  A) no electron will be emitted
  B) the few electrons emitted will have a maximum kinetic energy of 1eV
  C) the few electrons emitted will have a maximum kinetic energy of 3eV
  D) many electrons will be emitted
  Show Answer
  The correct answer is A .
• Question 79: Which of the following is NOT a vector quantity? Options:
  A) altitude
  B) acceleration
  C) displacement
  D) weight
  Show Answer
  The correct answer is A .
• Question 80:

  If a source of solid is moving, a stationary listener will hear a sound of different frequency. This is called?

  Options:
  A) doppler effect
  B) resonance
  C) ultra sound
  D) rarefaction
  Show Answer
  The correct answer is A .