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 361:

  Metal rods of length 20m each are laid end to end to form a bridge at 25^oC. What gap will be provided between consecutive rails for the bridge to withstand 75^oC?

  [Linear expansivity of the material = 2.0 x 10^-5K^-1]

  Options:
  A) 0.20m
  B) 0.22m
  C) 0.25m
  D) 0.02m
  Show Answer
  The correct answer is D .
• Question 362: For a short sighted person, light rays from a point on a very distant object is focused Options:
  A) in front of the retina
  B) on the retina by a converging lens
  C) behind the retina by a diverging lens
  D) in front of the retina, a distance 2F from the lens
  Show Answer
  The correct answer is A .
• Question 363: 200g of water at 90^oC is mixed with 100g of water at 30^oC. What is the final temperature? Options:
  A) 50^oC
  B) 60^oC
  C) 70^oC
  D) 80^oC
  Show Answer
  The correct answer is C .
• Question 364: Electrical appliances at home are normally earthed so that Options:
  A) the appliances are maintained at a lower p.d than the earth
  B) both the a.c and d.c sources can be used
  C) a person touching the appliances is safe from electric shock
  D) the appliances are maintained at a higher p.d than the earth
  Show Answer
  The correct answer is C .
• Question 365:

  

  The water manometer above is measuring the pressure of gas supply. if the specific gravity of mercury is 13.6 and the atmospheric pressure is 70cm of mercury what is the total pressure of the gas supply in cm of water

  Options:
  A) 67cm
  B) 73cm
  C) 949cm
  D) 952cm
  E) 955cm
  Show Answer
  The correct answer is E .
• Question 366: The time t₁, t₂ and t₃ for 20 complete oscillations of a simple pendulum experiment are 32.0s, 34.6s and 35.5s respectively. Calculate the mean period of the pendulum. Options:
  A) 1.60s
  B) 1.70s
  C) 1.73s
  D) 1.78s
  E) 5.11s
  Show Answer
  The correct answer is B .
• Question 367:

  A gas at a volume of V${}_0$ in a container at pressure p${}_0$ is compressed to one-fifth of its volume. What will be its pressure if the magnitude of its original temperature T is constant?

  Options:
  A) $\frac{p_0}{5}$
  B) $\frac{4p_0}{5}$
  C) p${}_0$
  D) 5P${}_0$
  Show Answer
  The correct answer is D .
• Question 368: A temperature scale has a lower fixed point of 40mm and a upper fixed point of 200mm. What is the reading on this scale when a thermometer reads 60^oC? Options:
  A) 33.3mm
  B) 36.0mm
  C) 96.0mm
  D) 136.0mm
  Show Answer
  The correct answer is D .
• Question 369: A ball of mass 100g falls from a height of 5m onto a concrete floor and rebounds to a height of 3m. Calculate the energy lost. (g = 10ms^-2) Options:
  A) 2J
  B) 20J
  C) 100J
  D) 1000J
  E) 2000J
  Show Answer
  The correct answer is A .
• Question 370:

  I. Its velocity is constant

  II. No work is done on the body

  III. It has constant acceleration directed away from the centre

  IV. The centripetal force is directed towards the centreWhich combination of the above is true of a body moving with constant speed in a circular track?

  Options:
  A) II and IV
  B) I and IV
  C) II and III
  D) I and III
  Show Answer
  The correct answer is A .