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 1: 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 2: Heat is supplied to a block of ice 0^o until half of it has melted. Which of the following statements is true? Options:
  A) the temperature rises and the ice exoands
  B) the temperature remains constant and the volume of ice decreases
  C) the ice gives out heat as it melts
  D) the mass remains constant and the temperature increases
  E) the mass decreases because some heat is lost to the atmosphere
  Show Answer
  The correct answer is B .
• Question 3:

  ${}_{92}^{235}U{+}_0^{1}n{\to }_{56}^{144}Ba{+}_{36}^{90}Kr+2X$

  In the reaction above, X is

  Options:
  A) electron
  B) proton
  C) neutrino
  D) neutron
  Show Answer
  The correct answer is D .
• Question 4: A body whose mass is 2kg and has a volume of 500cm just floats when completely immersed in a liquid. Calculate the density of the liquid Options:
  A) 4.0 x 10²kgm^-3
  B) 4.0 x 10³kgm^-3
  C) 1.0 x 10³kgm^-3
  D) 1.0 x 10⁶kgm^-3
  Show Answer
  The correct answer is B .
• Question 5:

  A bead travelling on a straight line wire is brought to rest at 0.2 by friction. If the mass of the bead is 0.01kg and the coefficient of friction between the bead and the wire is 0.1, determine the work one by the friction. [g = 10ms²]

  Options:
  A) 2 $\times$ 10^-4
  B) 2 $\times$ 10^-3
  C) 2 $\times$ 10¹
  D) 2 $\times$ 10²
  Show Answer
  The correct answer is B .
• Question 6: If the refractive index of glass is 1.5, what is the critical angle at the air-glass interface? Options:
  A) sin^-1$\frac{1}{2}$
  B) sin^-1$\frac{2}{3}$
  C) sin^-1$\frac{3}{4}$
  D) sin^-1$\frac{8}{9}$
  Show Answer
  The correct answer is B .
• Question 7:

  A 20-toothed gear wheel drives a 60-toothed one. If the angular speed of the smaller wheel is 120 rev s^-1, the angular speed of the larger wheel is

  Options:
  A) 3 rev s^-1
  B) 40 rev s^-1
  C) 360 rev s^-1
  D) 2400 rev s^-1
  Show Answer
  The correct answer is B .
• Question 8: It is observed that water will wet a clean glass because the Options:
  A) cohesion of water to glass is stronger than the cohesion of water molecules
  B) adhesion of water molecules is weaker than the cohesion of water to glass
  C) cohesion of water to glass is weaker than the cohesion of water molecules
  D) adhesion of water molecules is stronger than the cohesion of water molecules
  Show Answer
  The correct answer is D .
• Question 9:

  In an inelastic collisionI. Energy is conversed

  II. Energy is decreased

  III. Energy is increased

  IV. Linear momentum conversed

  Options:
  A) I only
  B) II and IV only
  C) II only
  D) III only
  Show Answer
  The correct answer is B .
• Question 10: A steady current of 2A flows in a coil of emf 12V for 0.4s. A back emf of 3V was induced during this period. The stored energy in the loop that can be utilized is Options:
  A) 9.6J
  B) 2.4J
  C) 12.0J
  D) 7.2J
  Show Answer
  The correct answer is B .