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 1421:

  Two metals P and Q are heated through the same temperature difference. If the ratio of the linear expansivities of P to Q is 2:3 and the ratio of their

  Length is 3: 4 respectively, the ratio of the increase in lengths of P to Q is

  Options:
  A) 1:2
  B) 2:1
  C) 8:9
  D) 9:8
  Show Answer
  The correct answer is A .
• Question 1422: 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 1423: Which is the incorrect formula for a body accelerating uniformly? Options:
  A) a = v² − u$\frac{2}{2}$
  B) v² = u² + 2as
  C) s = $\frac{1}{2}$ut + at²
  D) v² − u²= 2as
  Show Answer
  The correct answer is C .
• Question 1424: An object is placed 10cm in front of a concave mirror of focal length 15cm. What is the position and nature of the image formed? Options:
  A) 30cm and virtual
  B) 6cm and real
  C) 6cm and virtual
  D) 30cm and real
  Show Answer
  The correct answer is A .
• Question 1425: PHCN measures its electrical energy in Options:
  A) W
  B) KWh
  C) Wh
  D) J
  Show Answer
  The correct answer is B .
• Question 1426: The image obtained on the screen of a pin-hole camera becomes less sharply defined when the Options:
  A) object is moved farther from the pin-hole
  B) screen is moved farther from the pin-hole
  C) object is made smaller
  D) illumination is made more intense
  E) pin-hole is made larger.
  Show Answer
  The correct answer is E .
• Question 1427:

  

  Fig 10 above shows a see-saw which is perfectly in balance, the weighs of the people sitting on it are 50kg, xkg and 15kg as shown, the sit at distances of 1.5, 1.5 and 2m from the pivot respectively. The vale of X is

  Options:
  A) 30
  B) 35
  C) 70
  D) 24.25
  E) impossible to find
  Show Answer
  The correct answer is A .
• Question 1428: What gives rise to the line spectra observed in atoms? Options:
  A) change of an electron from a higher to a lower energy level in the atom
  B) disturbed protons in the nucleus
  C) excitation of an electron in the atom
  D) kinetic energy of a moving atom
  E) potential energy of an electron inside an atom
  Show Answer
  The correct answer is A .
• Question 1429:

  A body of mass 4 kg resting on a smooth horizontal plane is simultaneously acted upon by two perpendicular forces 6N and 8N. Calculate the acceleration of the motion.

  Options:
  A) 2.5 ms^-2
  B) 3.0 ms^-2
  C) 4.0 ms^-2
  D) 4.5 ms^-2
  Show Answer
  The correct answer is A .
• Question 1430: In an a.c circuit that contains only a capacitor, the voltage lags behind the current by Options:
  A) 180°
  B) 90°
  C) 60°
  D) 30°
  Show Answer
  The correct answer is B .