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 511: A sonometer wire of length 100cm under a tension of 10N, has a frequency of 250Hz. Keeping the length of the wire constant, the tension is adjusted to produce a new frequency of 350Hz. The new tension is Options:
  A) 5.1N
  B) 7.1N
  C) 14.0N
  D) 19.6N
  Show Answer
  The correct answer is D .
• Question 512: If the Nigeria flag (green, white, green) is viewed in pure yellow light, which of the following set of colours would be observed on the flag? Options:
  A) Green, yellow, green
  B) Red, yellow, red
  C) black, yellow, black
  D) Green, white, green
  Show Answer
  The correct answer is A .
• Question 513: The resistance of a 5m uniform wire of cross-sectional area 0.2 x 10^-6m² is 0.425. What is the resistivity of the material of the wire? Options:
  A) 1.10 x 10^-6$\mathrm{\Omega }$m
  B) 4.25 x 10^-6$\mathrm{\Omega }$m
  C) 2.40 x 10^-7$\mathrm{\Omega }$m
  D) 1.70 x 10^-8$\mathrm{\Omega }$m
  Show Answer
  The correct answer is D .
• Question 514:

  Which of the following is not a vector quantity?

  Options:
  A) momentum
  B) force
  C) temperature
  D) displacement
  Show Answer
  The correct answer is C .
• Question 515: A 20kg mass is to be pulled up a slope inclined at 30^o to the horizontal. If the efficiency of the plane is 75%, the force required to pull the load up the plane is [g = 10ms^-2] Options:
  A) 13.3N
  B) 73.5N
  C) 133.3N
  D) 53.2N
  Show Answer
  The correct answer is C .
• Question 516:

  The equation of a wave traveling along the positive x-direction is given by; y = 0.25 x 10${}^{-3}$ sin (500t - 0.025x). Determine the angular velocityof the wave motion.

  Options:
  A) 0.25 x 10${}^{-3}$rads${}^{-1}$
  B) 0.25 x 10${}^{-1}$rads${}^{-1}$
  C) 5.00 x 10${}^2$rads${}^{-1}$
  D) 2.50 x 10${}^3$rads${}^{-1}$
  Show Answer
  The correct answer is C .
• Question 517:

  A generator manufacturing company accidentally made an AC generator instead of a DC generator. To fix this error,

  Options:
  A) the magnetic field needs to be made stronger
  B) the split rings should be replaced with slip rings
  C) the number of turns of the armature coil needs to be decreased
  D) the slip rings should be replaced with split rings
  Show Answer
  The correct answer is D .
• Question 518:

  If the frequency of an emitted x-ray is 1.6 x 10¹⁶Hz, the accelerating potential is?

  [e = 1.6 x 10^-19C, h = 6.63 x 10^-34Js]

  Options:
  A) 6630.0V
  B) 663.0V
  C) 66.3V
  D) 6.6V
  Show Answer
  The correct answer is C .
• Question 519: If a room is saturated with water vapour, the temperature of the room must be Options:
  A) at 0^oC
  B) above the dew point
  C) at 100^oC
  D) below or at the dew point
  Show Answer
  The correct answer is D .
• Question 520: The production and type of charge of a body can only be accounted for by the? Options:
  A) deficiency or surplus of electrons
  B) equibrium in protons and neutrons
  C) deficiency or surplus of protrons
  D) deficiency or surplus of neutrons
  Show Answer
  The correct answer is A .