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 2381: Which of the following factors has no effect on the e.m.f. of a primary cell? Options:
  A) temperature
  B) size of the cell
  C) nature of the plate
  D) nature of the electrolyte
  Show Answer
  The correct answer is B .
• Question 2382: Two bodies have masses in the ratio 3:1. They experience forces which impart to them acceleration in the ratio 2:9 respectively. Find the ratio of forces the masses experienced. Options:
  A) 1 : 4
  B) 2 : 1
  C) 2 : 3
  D) 2 : 5
  Show Answer
  The correct answer is C .
• Question 2383:

  A boat at anchor is rocked by waves whose crest are 100m apart and whose velocity is 25ms^-1. At what interval does the wave crest reach the boat?

  Options:
  A) 2500.00s
  B) 75.00s
  C) 4.00s
  D) 0.25s
  Show Answer
  The correct answer is C .
• Question 2384: Which of the following is true of sounds? Options:
  A) sound travels faster in air at 20^oC than at 30^oC
  B) the frequency of a given sound wave changes when it crosses the boundary seperating two media
  C) the wavelength of a given sound wave in air decreases as the temperature increases
  D) sound waves cannot be reflected
  Show Answer
  The correct answer is C .
• Question 2385:

  A force of 200N acts between two objects at a certain distance apart. The value of the force when the distance is halved is

  Options:
  A) 400N
  B) 200N
  C) 100N
  D) 800N
  Show Answer
  The correct answer is D .
• Question 2386: If a current carrying coil is mounted on a metal frame, the back e.m.f. induced in the coil causes Options:
  A) inductance
  B) eddy currents
  C) elecro-magnetism
  D) dipole moment
  Show Answer
  The correct answer is B .
• Question 2387:

  

  A body on the ground is acted on by a force of 10N at a point P as shown in the fig above. What force is needed to stop the body from moving eastwards

  Options:
  A) 5N in the direction of east
  B) 5N in the diretion of west
  C) 5V3N in the direction of west
  D) 10N in the southwest direction
  Show Answer
  The correct answer is B .
• Question 2388: An equipment whose power is 1500W and resistance is 375 ohms would draw a current of Options:
  A) 0.10A
  B) 2.00A
  C) 4.00A
  D) 77.5A
  Show Answer
  The correct answer is B .
• Question 2389: A progressive wave is represented by $y=10\text{Sin}(1000\pi t-\frac{\pi x}{34})$ . two layers of the wave separated by 153cm have a phase difference of Options:
  A) 270⁰
  B) 45⁰
  C) 90⁰
  D) 180⁰
  E) No Correct Option
  Show Answer
  The correct answer is E .
• Question 2390:

  Which of the following statements is/are correct for a freely falling body?

  I. the total is entirely kinetic

  II. the ratio of potential energy to kinetic energy is constant

  III. the sum of potential and kinetic energy is constant

  Options:
  A) I only
  B) II only
  C) III only
  D) I and III only
  Show Answer
  The correct answer is C .