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 381:

  A body weighing 80N stands in an elevator that is about to move. The force exerted by floor on the body as the elevator moves upward with an acceleration of 5 ms^-2 is

  [g = 10ms^-2]

  Options:
  A) 40 N
  B) 80 N
  C) 120 N
  D) 160 N
  Show Answer
  The correct answer is C .
• Question 382:

  The motion of a body is simple harmonic if the?

  Options:
  A) acceleration is always directed towards a fixed point
  B) path of motion is a straight line
  C) acceleration is proportional to the square of the distance from a fixed point
  D) acceleration is constant and directed towards a fixed point
  Show Answer
  The correct answer is A .
• Question 383: In copper plating, a current of 0.5A is allowed for cathode area of 100cm². If this current is maintained constant for 100 minutes, the thickness of the copper deposited will be approximately (the electrochemical equivalent of copper = 0.0003g/^oC, density of copper = 10^-4g/cm³ ) Options:
  A) 10^-2mm
  B) 10^-3mm
  C) 10^-4mm
  D) 10^-5mm
  E) 10^-6mm
  Show Answer
  The correct answer is E .
• Question 384: The latent heat of fusion of ice is 80cal g^-1. How much heat is required to change 10g of ice at Q^oC into water at the same temperature? Options:
  A) 80 cal
  B) 10 cal
  C) 8 cal
  D) 800 cal
  E) 400 cal
  Show Answer
  The correct answer is D .
• Question 385: Capacitors are used in the induction coil to Options:
  A) control circuits
  B) prevent distortion of electric fields
  C) prevent electric sparks
  D) dissipate energy
  Show Answer
  The correct answer is C .
• Question 386: The principle of transmissibility of pressure in a fluid at rest in all directions is known as Options:
  A) Archimede's principle
  B) Flotation Principle
  C) Newton's lwa
  D) Pascal's law
  E) Boyle's law
  Show Answer
  The correct answer is D .
• Question 387: Which of the following metals will provide the greatest shield against ionizing radiation Options:
  A) Iron
  B) Manganese
  C) Alminium
  D) Lead
  Show Answer
  The correct answer is D .
• Question 388: Which of the following units is equivalent to kgms^-1? Options:
  A) Ns^-1
  B) Nms^-1
  C) Ns
  D) Js^-1
  Show Answer
  The correct answer is C .
• Question 389:

  

  The figure above shows a uniform wood of weight 200N and length 50m. It is pivoted at one end and suspended by a cord at the other end at an angle of 30 degrees to the wood. Calculate the tension in the cord if the wood is horizontal.

  Options:
  A) 10N
  B) 20N
  C) 100N
  D) 200N
  Show Answer
  The correct answer is D .
• Question 390: The distance xm travelled by a particle in time t seconds is described by the equation x = 10 + 12t², Find the average speed of the particle between the time interval t = 2s and t = 5s Options:
  A) 60 ms^-1
  B) 72 ms^-1
  C) 84 ms^-1
  D) 108 ms^-1
  Show Answer
  The correct answer is B .