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 1101:

  

  The efficiency of the pulley system shown above is 80%. find the effort E required to lift the load of 1200N

  Options:
  A) 275N
  B) 325N
  C) 375N
  D) 573N
  Show Answer
  The correct answer is C .
• Question 1102: Which of the following statements about wave motion is correct? Options:
  A) Electromagnetic waves are transverse
  B) Transverse waves do not require a medium for propagation
  C) Longitudinal waves vibrate perpendicular to the direction of travel
  D) All mechanical waves are longitudinal
  Show Answer
  The correct answer is A .
• Question 1103: A solid suspended by a piece of string is completely immersed in water. On attempting to lift the solid out of the water, the string breaks when the solid is partly out of the water. This is because Options:
  A) the tension in the string decreases as the solid is lifted
  B) the mass of the solid has increased
  C) the solid apparently weighs less when completely immersed in water than when partially immersed
  D) part of the solid still in water is exerting more force on the string
  E) the solid is no longer in equilibrium with water
  Show Answer
  The correct answer is C .
• Question 1104: A solid weights 5.0 N in air, 4.2 N in water and 4.4 N in liquid Y. Calculate the relative density of liquid Y. Options:
  A) 0.75
  B) 0.88
  C) 0.95
  D) 1.13
  E) 1.33
  Show Answer
  The correct answer is A .
• Question 1105:

  A bar magnet is placed near and lying along the axis of a solenoid connected to a galvanometer. The pointer of the galvanometer shows no deflection when?

  Options:
  A) the magnet is moved towards the stationary solenoid
  B) there is no relative motion
  C) the magnet is moved away from the stationary solenoid
  D) the solenoid is moved away from the stationary magnet
  Show Answer
  The correct answer is B .
• Question 1106: When an alternating current given by I = 10sin (120π)t passes through a 12Ω resistor, the power dissipated in the resistor is Options:
  A) 1200W
  B) 600W
  C) 120W
  D) 30W
  Show Answer
  The correct answer is A .
• Question 1107:

  Arrange the following in the order of their increasing frequency.I. Visible light

  II. Gamma rays

  III. Radio waves

  IV. Infra-red radiation

  V. Ultra-violet radiation

  Options:
  A) I, II, III, IV, V
  B) II, III, IV, V, I
  C) III, IV, V, I, II
  D) IV, III, I. V, II
  E) III, IV, I,V, II
  Show Answer
  The correct answer is E .
• Question 1108:
  

  In the diagram above, if the south poles of two magnets stroke a steel bar, the polarities at X and Y will respectively be

  Options:
  A) south and north
  B) north and south
  C) north and north
  D) south and south
  Show Answer
  The correct answer is C .
• Question 1109: An electron of charge 1.6 x 10^-19C is accelerated between two metal plates. If the kinetics energy of the electron is 4.8 x 10^-17J, the potential difference between the plate is Options:
  A) 30V
  B) 40V
  C) 300V
  D) 400V
  Show Answer
  The correct answer is C .
• Question 1110: A small steel needle is carefully floated on water in a beaker. When a few drops of kerosine are introduced into the water the needle sink. Which of the following statements correctly explain(s) the observation? i. there is tension on the water surface ii. kerosine reduces the density of water so that needle becomes denser than water iii. kerosine reduces the surface tension of water Options:
  A) i only
  B) ii only
  C) iii only
  D) i and ii
  E) i and iii
  Show Answer
  The correct answer is E .