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 211: If a resistance is halved in value and the potential difference across it is tripled, then the ratio of the new current to the old one is Options:
  A) 1 : 6
  B) 1 : 3
  C) 2 : 1
  D) 6 : 1
  Show Answer
  The correct answer is D .
• Question 212:

  

  The wire X in the figure above is at right angles to the plane of the paper and carries a current into the paper. at which of the points labelled 1-4, will the magnetic flux density due to this current be in the same direction as that of the horizontal component of earth's magnetic field

  Options:
  A) 1
  B) 2
  C) 3
  D) 4
  Show Answer
  The correct answer is C .
• Question 213: A motor boy of a driver saw what seem to appear to be a pool of water a head of him, while his driver’s drives a new truck on a funny day. Which of the following explains his observation? Options:
  A) He saw a flying objects
  B) He must be thinking of water and food
  C) He was seeing the shadow of the car
  D) The sun ray from the sky were passing from a hot air (layer) to cold layer
  Show Answer
  The correct answer is D .
• Question 214: A body of mass 10kg rests on a rough inclined plane whose angle of tilt $\theta$ is variable. $\theta$ is gradually increased until the body starts to slide down the plane at 30^o. The coefficient of limiting friction between the body and the plane Options:
  A) 0.30
  B) 0.50
  C) 0.58
  D) 0.87
  Show Answer
  The correct answer is C .
• Question 215:

  The mass of water vapour in a given volume of air is 0.05g at 20°C, while the mass of water vapour required to saturate it at the same temperature is 0.15g. Calculate the relative humidity of the air.

  Options:
  A) 3.33%
  B) 5.55%
  C) 33.33%
  D) 55.55%
  Show Answer
  The correct answer is C .
• Question 216:

  The binding energy of (${}_2^4\text{He}$) is

  [atomic mass of proton = 1.00783U, atomic mass of neutron = 1.00867U]

  Options:
  A) 4.033U
  B) 2.017U
  C) 0.033U
  D) 0.330U
  Show Answer
  The correct answer is C .
• Question 217:

  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 218:

  A 1000kg elevator is descending vertically with an acceleration of 1.0ms^-2, if the acceleration due to gravity is 10ms^-2, the tension in the suspending cable is

  Options:
  A) 1.0N
  B) 10.0N
  C) 9000.0N
  D) 11000N
  Show Answer
  The correct answer is C .
• Question 219: Ripples on water and light waves are similar because both Options:
  A) have the same frequency
  B) can be refracted and diffracted
  C) are longitudinal waves
  D) have the same velocity
  Show Answer
  The correct answer is C .
• Question 220:

  

  In the diagram above, the hanging mass m2 is adjusted until m1 is on the verge of sliding. The coefficient of static friction between the mass m1 and the table is

  Options:
  A) m1/m2
  B) m1g/m2
  C) m2/m1
  D) m2g/m1
  Show Answer
  The correct answer is C .