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 1931: If a solid changes directly into a gas when heat is applied the process is called Options:
  A) vaporization
  B) evaporation
  C) sublimation
  D) ionization
  E) conversion
  Show Answer
  The correct answer is C .
• Question 1932: A spring of force constant 1500Nm^-1 is acted upon by a constant force of 75N. Calculate the potential energy stored in the string Options:
  A) 1.9J
  B) 2.8J
  C) 3.45J
  D) 0.43J
  Show Answer
  The correct answer is A .
• Question 1933: In which of the following is surface tension important? Options:
  A) the floating of a ship in water
  B) the floating of a dry needle in water
  C) the floating of a baloon in air
  D) the diffusion of sugar solution across a membrane
  Show Answer
  The correct answer is B .
• Question 1934:

  Which of these is observed when air is pumped out of a discharge tube without lowering its pressure

  Options:
  A) the conductivity of the air increases
  B) the conductivity of the air decreases
  C) conduction does not occur
  D) spark are produced
  Show Answer
  The correct answer is C .
• Question 1935: The space between the double glass walls of a thermos flask is evacuated space are silvered. The residual source of heat loss takes place by Options:
  A) convection
  B) radiation from the surface
  C) conduction through the stopper and the glass
  D) conduction across the walls
  Show Answer
  The correct answer is C .
• Question 1936: A p-n junction diode is used as? Options:
  A) a rectifier in a d.c circuit
  B) an amplifier in d.c circuit
  C) an anplifier in an a.c circuit
  D) a rectifier in an a.c circuit
  Show Answer
  The correct answer is D .
• Question 1937:

  A balloon inflated with helium gas at ground level is released. As it rises through a constant temperature atmosphere.

  Options:
  A) its pressuren reduces but volume remains constant
  B) te product of pressure and volume remains constant
  C) both pressure and volume increases
  D) its pressure remains constant but the volume decreases
  E) both pressure and volume remains constant
  Show Answer
  The correct answer is B .
• Question 1938: If a tube of small radius opened at both ends is placed in a liquid, the liquid will Options:
  A) remain at the same level irrespective of whether the liquid wet the glass or not
  B) fall below the liquid level if the liquid wets the glass
  C) falls below the liquid level if the liquid does not wet the glass
  D) rise above the liquid level if the liquid does not wet the glass
  Show Answer
  The correct answer is C .
• Question 1939: If the distance from a point source of sound is doubled, by what factor does the intensity decrease? Options:
  A) 4.00
  B) 2.00
  C) 0.50
  D) 0.25
  Show Answer
  The correct answer is A .
• Question 1940: A wire P has half the diameter and half the length of a wire Q of similar material. The ratio of the resistance of P to that of Q is Options:
  A) 8 : 1
  B) 4 : 1
  C) 2 : 1
  D) 1 : 1
  E) 1 : 4
  Show Answer
  The correct answer is C .