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 711: The heat produced in a conductor carrying an electric current is Options:
  A) inversely proportional to the current and the resistance
  B) directly proportional to the current, resistance and the time
  C) inversely proportional to of the resistance, current and the time
  D) directly proportional to the square of the current, the resistance and the time
  Show Answer
  The correct answer is D .
• Question 712:

  

  What is the total resistance in the above diagram

  Options:
  A) 5 ohms
  B) 15 ohms
  C) 25 ohms
  D) 35 ohms
  E) 45 ohms
  Show Answer
  The correct answer is C .
• Question 713: In a gas experiment, the pressure of the gas is plotted against the reciprocal of the volume of the gas at a constant temperature. the unit of the slope of the resulting curve is Options:
  A) force
  B) force/m
  C) work
  D) force/m³
  E) energy/m³
  Show Answer
  The correct answer is C .
• Question 714: Which of the following has the lowest internal resistance when new? Options:
  A) leclanche cell
  B) Daniel cell
  C) Accumulator
  D) Torch battery
  Show Answer
  The correct answer is C .
• Question 715: Which of the following is true of an electrical charge? Options:
  A) positive charge means deficit electrons
  B) negative charge means excess of electrons
  C) electric current means movement of electrons
  D) all of the above
  E) A and B only
  Show Answer
  The correct answer is D .
• Question 716: Which of the following statements about electrolysis is NOT correct? Options:
  A) The substances in solution in the electrolyte become ionized
  B) Ions are electrically charged and are attracted towards electrodes when a potential difference is applied
  C) Ions may be discharged at the electrodes, forming bubbles or deposits
  D) The mass deposited depends upon the length of time for which current flows
  E) The mass of gas set free or metal deposited is proportional to the square of the current
  Show Answer
  The correct answer is E .
• Question 717: The ability of the human eye to focus object on the retina is referred to as the power of Options:
  A) interference
  B) diffraction
  C) accomodation
  D) superposition
  Show Answer
  The correct answer is C .
• Question 718:

  A few grains of table salt were put in a cup of cold water, kept at constant temperature and left undistributed. Eventually all the water tested salty. This action isdue to?

  Options:
  A) convection
  B) osmosis
  C) capillarity
  D) diffusion
  Show Answer
  The correct answer is D .
• Question 719: A body accelerating will have a constant speed if it is Options:
  A) falling from a height
  B) in equilibrium
  C) moving in a circular path
  D) moving in a straight line
  E) oscillating
  Show Answer
  The correct answer is C .
• Question 720: The electromotive force obtained from a simple dynamo may be increased by Options:
  A) increasing the cross-sectional area of the coil
  B) winding the coil on a soft-iron armature so as to decrease the magnetic flux through the coil
  C) increasing the speed of rotation
  D) making the field magnet longer
  E) using low-resistance copper coils
  Show Answer
  The correct answer is C .