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 61: 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 62:

  I. A liquid boils when its saturated vapour pressure is equal to the external pressure
  II. Dissolved substances in pure water lead to increase in the boiling point.
  III. When the external pressure is increased, the boiling point increases.
  IV. Dissolved substances in pure water decrease the boiling point.

  Which combination of the above are peculiarities of the boiling point of a liquid?

  Options:
  A) I, II and III
  B) I, II, III and IV
  C) I, II and IV
  D) II, III and IV
  Show Answer
  The correct answer is A .
• Question 63: If the focal length of a camera lens is 20cm, the distance from the film at which the lens must be set to produce a sharp image of an object 100cm away is Options:
  A) 17cm
  B) 20cm
  C) 25cm
  D) 100cm
  Show Answer
  The correct answer is C .
• Question 64: Total internal reflection will not occur when light travels from Options:
  A) water to air
  B) water into glass
  C) glass to air
  D) glass into water
  Show Answer
  The correct answer is B .
• Question 65:

  Dry

  Day 1 - 30°C | Day 2 - 29°C | Day 3 - 25°CWet

  Day 1 - 22°C | Day 2 - 22°C | Day 3 - 21°CThe reading above are for three consecutive days from a wet and dry bulb hygrometer. It can be concluded that the relative humidity for the three days

  Options:
  A) decreased steadily
  B) remained unchanged
  C) increased steadily
  D) was least on Day 1
  Show Answer
  The correct answer is C .
• Question 66:

  A boat at anchor is rocked by waves whose crest are 100m apart and whose velocity is 25ms^-1. At what interval does the wave crest reach the boat?

  Options:
  A) 2500.00s
  B) 75.00s
  C) 4.00s
  D) 0.25s
  Show Answer
  The correct answer is C .
• Question 67: If I is the current passing through a metallic resistor and H is the rate of Heat generated in the resistor at a constant temperature, then Options:
  A) H $\alpha$ $\frac{1}{I}$
  B) H $\alpha$ $\frac{1}{I^2}$
  C) H $\alpha$ $\sqrt{1}$
  D) H $\alpha$ I²
  E) none of the above
  Show Answer
  The correct answer is D .
• Question 68:

  The surface temperature of a swimming pool on a warm day is 25ºC and the temperature at the bottom is 15ºC. If the swimming pool has a surface area of 620 $m^2$ and a depth of 1.5m. Find the rate at which energy is transferred by conduction from the surface to the bottom of the swimming pool.

  [Thermal conductivity of water (k) = 0.6071 Wm-1K-1]

  Options:
  A) 2.5kw
  B) 250kw
  C) 300kw
  D) 3.0kw
  Show Answer
  The correct answer is A .
• Question 69: When a man moves toward a plane mirror at a speed of 6m/s, the distance the man and his image increased at a speed of? Options:
  A) 2 m/s
  B) 4 m/s
  C) 12 m/s
  D) 14 m/s
  Show Answer
  The correct answer is C .
• Question 70:

  Which of the following is a type of wave that is both mechanical and longitudinal?

  Options:
  A) Water waves
  B) Seismic waves
  C) Sound waves
  D) Light waves
  Show Answer
  The correct answer is C .