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 1491:

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

  In the reaction above, X is

  Options:
  A) electron
  B) proton
  C) neutrino
  D) neutron
  Show Answer
  The correct answer is D .
• Question 1492: The maximum permissible current through a galvanometer G of internal resistance 10$\mathrm{\Omega }$ is 0.05A. A resistance R is used to convert G into a voltmeter with a maximum reading of 100V. Find the value of R and how it is connected to G Options:
  A) 20,000 ohms in parallel
  B) 19,990 ohms in series
  C) 1990 ohms in series
  D) 100 ohms in series
  Show Answer
  The correct answer is C .
• Question 1493: A pilot records the atmospheric pressure outside its plane as 63cm of Hg while a ground observer records a reading of 75cm of Hg for the atmospheric pressure on the ground. Assuming that the density of the atmosphere is constant, calculate the height of the plane above the ground. (Relative density of Hg = 13.0 and that of air = 0.00013) Options:
  A) 1200m
  B) 6300m
  C) 7500m
  D) 13800m
  Show Answer
  The correct answer is A .
• Question 1494: 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 1495:

  The height at which the atmosphere cases to exist is about 80km. If the atmospheric pressure on the ground level is 760mmHg, the pressure at a height of 20km above the ground level is

  (ρm = 13.6g/cm${}^3$ ρ = 0.00013g/cm${}^3$ )

  Options:
  A) 380mmHg
  B) 570mmHg
  C) 190mmHg
  D) 480mmHg
  Show Answer
  The correct answer is B .
• Question 1496: The direction of the magnetic field at a point in the vicinity of a bar magnet is Options:
  A) always towards the north pole of the magnet
  B) always away from the south pole of the magnet
  C) along the line joining the point to the neutral point
  D) in the direction the north pole of a compass needle would point
  Show Answer
  The correct answer is D .
• Question 1497: The linear expansivity of brass is 2 x 10^-5oC^-1. If the volume of a piece of brass is 10cm³ at 0^oC, what will be its volume at 100^oC? Options:
  A) 10.02cm³
  B) 10.04cm³
  C) 10.06cm³
  D) 10.20cm³
  E) 102.00cm³
  Show Answer
  The correct answer is C .
• Question 1498:

  When the downward current flows in a straight vertical conductor, the direction of its magnetic field at a point due north of the wire is

  Options:
  A) Upward
  B) North
  C) South
  D) West
  Show Answer
  The correct answer is D .
• Question 1499:

  In the formation of sea breeze, wind blows from?

  Options:
  A) sky to land
  B) sea to sky
  C) land to sea
  D) sea to land
  Show Answer
  The correct answer is D .
• Question 1500: 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 .