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 2171:

  A given mass of gas has a pressure of 80 Nm${}^{-2}$ at a temperature of 47 C. If the temperature is reduced to 27 C with volume remaining constant, the new pressure is?

  Options:
  A) 46.0 Nm${}^{-2}$
  B) 75.0 Nm${}^{-2}$
  C) 80.0 Nm${}^{-2}$
  D) 85.3 Nm${}^{-2}$
  Show Answer
  The correct answer is B .
• Question 2172: Which of the following is a set of vectors? Options:
  A) force, mass and moment
  B) acceleration, velocity and moment
  C) mass, weight and density
  D) mass, volume and density
  Show Answer
  The correct answer is B .
• Question 2173: A radioactive isotope has a half-life of 8 days. What fraction of the atoms will remain after 72 days? Options:
  A) 9.766 × 10^-4
  B) 1.736 ×10^-3
  C) 1.953 ×10^-3
  D) 3.472 × 10^-3
  E) 3.906 x 10^-3
  Show Answer
  The correct answer is C .
• Question 2174:

  

  The figure above represents a frictionless pulley system in which a weight W is in equilibrium with a weight of 40N. Find the value of W.

  Options:
  A) 13.3N
  B) 20.0N
  C) 40.0N
  D) 80.0N
  Show Answer
  The correct answer is C .
• Question 2175:

  A step-down transformer is used on a 2.2 kV line to deliver 110 V. How many turns are on the primary windings if the secondary has 25 turns?

  Options:
  A) 20
  B) 250
  C) 200
  D) 500
  Show Answer
  The correct answer is D .
• Question 2176: Calculate the work done in charging a capacitor of capacitance 20µF through a potential difference of 1000V. Options:
  A) 0.02 J
  B) 0.10 J
  C) 0.20 J
  D) 1.00 J
  E) 10.00 J
  Show Answer
  The correct answer is E .
• Question 2177: Energy losses through eddy currents are reduced by using Options:
  A) low resistance wires
  B) insulated soft iron wires
  C) few turns of wires
  D) high resistance wires
  Show Answer
  The correct answer is B .
• Question 2178: The distance between two successive crests of a water is 1m. lf a particle on the surface of the water makes two complete vertical oscillations in 1 second, calculate the speed of the wave Options:
  A) 0.5 ms^-1
  B) 1.0 ms^-1
  C) 2.0ms^-1
  D) 3.0ms^-1
  E) 4.0ms^-1
  Show Answer
  The correct answer is C .
• Question 2179: A car accelerate uniformly from rest at 4 ms^-2. How far will it travel in the fifth complete second? Options:
  A) 100 m
  B) 50m
  C) 32 m
  D) 18 m
  Show Answer
  The correct answer is D .
• Question 2180: Isotopes are nuclei which have Options:
  A) the same number of nuetrons and electrons
  B) equal number of electrons and protons
  C) the same atomic number but different number of neutrons
  D) the same number of total particles
  Show Answer
  The correct answer is C .