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 471:

  During the transformation of matter from the solid to the liquid state, the heat supplied does not produce temperature increase because

  Options:
  A) all the heat is used to break the bonds holding the molecules of the solid together
  B) the heat capacity has become very large as the substance melts
  C) the heat energy is quickly conducted away
  D) the heat gained is equal to the heat lost by the substance
  Show Answer
  The correct answer is A .
• Question 472: A piece of wood is floating on water. The forces acting on the wood are Options:
  A) upthrust and reaction
  B) weight and reaction
  C) weight and upthrust
  D) upthrust and viscousity
  E) weight and viscousity
  Show Answer
  The correct answer is C .
• Question 473:

  A bridge made of steel is 600m long. What is the daily variation in its length if the night-time and daytime temperatures are 10^oC and 35^oC respectively. The linear expansivity of steel is 0.000012C^-1

  Options:
  A) 0.18cm
  B) 1.80cm
  C) 18.00cm
  D) 1800cm
  Show Answer
  The correct answer is C .
• Question 474:

  

  The diagram above represents the stress-strain graph for a typical metal rod. What does the X represent?

  Options:
  A) Breaking point
  B) Yield point
  C) Elastic limit
  D) Proportional limit
  Show Answer
  The correct answer is A .
• Question 475:

  A lorry accelerates uniformly in a straight line with acceleration of $4m{s}^{-}2$ and covers a distance of 250 m in a time interval of 10 s. How far will it travel in the next 10 s?

  Options:
  A) 650
  B) 900
  C) 800
  D) 250
  Show Answer
  The correct answer is A .
• Question 476: A 0 - 10mA galvanometer with a coil resistance of 30$\mathrm{\Omega }$ can be converted to a 0 - 10A ammeter by using Options:
  A) 0.03$\mathrm{\Omega }$ series resistor
  B) 0.03$\mathrm{\Omega }$ shunt resistor
  C) 9.99$\mathrm{\Omega }$ shunt resistor
  D) 9.99$\mathrm{\Omega }$ series resistor
  Show Answer
  The correct answer is B .
• Question 477:

  In which of the following device in the expansion of solid is a disadvantages?I. Simple pendulum

  II. Fire alarms

  III. Thermostat

  IV. Bimetallic thermometer

  Options:
  A) III only
  B) II & III only
  C) I only
  D) II, III & IV only
  Show Answer
  The correct answer is C .
• Question 478:

  The velocities of light in air and glass are 3.0 x 10${}^8$ms${}^{-1}$ and 2.0 x 10${}^8$ms${}^{-1}$ respectively. If the angle of refraction is 30º, the sine of the angle of incidence is?

  Options:
  A) 0.33
  B) 0.50
  C) 0.67
  D) 0.75
  Show Answer
  The correct answer is D .
• Question 479: Two objects, one having three times the mass of the other, are dropped at the same time from a tall building. When they are above the ground, the two objects will have the same Options:
  A) Momentum
  B) Kinetic energy
  C) Potential energy
  D) Acceleration
  Show Answer
  The correct answer is C .
• Question 480: Which of the following statements are NOT correct? Options:
  A) boiling occurs when the saturated vapour pressure of the liquid involved equals the external pressure
  B) both the boiling point and the saturated vapour pressure of a given liquid depends on the external pressure
  C) the saturated vapour presssure rises with increase in temperature
  D) the saturated vapour pressure is independent of the volume available for the vapour
  E) it is possible to boil water at a lower temperature than 100^oC at high altitude
  Show Answer
  The correct answer is E .