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 2821:

  I. All the three forces must be concurrent.

  II. The upward force is equal to the downward force.

  III. The algebraic sum of the moment about any point must be zero.which of the above conditions must hold for a body acted upon by a system of three coplanar forces equilibrium?

  Options:
  A) I and II only
  B) I and III only
  C) II and III only
  D) I, II and III
  Show Answer
  The correct answer is B .
• Question 2822:

  The mass of a nucleus is the

  Options:
  A) total number of its proton and neutrons
  B) number of its protons
  C) mass of its electrons
  D) total number of its protons and electrons
  Show Answer
  The correct answer is A .
• Question 2823: An object 15cm high is 30cm from pin-hole camera. If the height of the image formed at the back of the camera is 10cm, the image distance is Options:
  A) 20cm
  B) 45cm
  C) 54cm
  D) 63cm
  E) 70cm
  Show Answer
  The correct answer is A .
• Question 2824: Three 3ω resistance are connected in parallel what is the equivalent resistance? Options:
  A) 1ω
  B) 9ω
  C) 3ω
  D) 0.33ω
  Show Answer
  The correct answer is A .
• Question 2825:

  

  The figure above shows a uniform circular object, center R and diameter PS. A circular section 6 and Diameter PR is cut from it. if PQRS is a straight line, where is center of gravity of the figure

  Options:
  A) Q
  B) R
  C) A point between P and R
  D) A point between R and S
  Show Answer
  The correct answer is D .
• Question 2826: If light with photon energy 2eV is incident suitably on the surface of a metal with work function 3eV, then Options:
  A) no electron will be emitted
  B) the few electrons emitted will have a maximum kinetic energy of 1eV
  C) the few electrons emitted will have a maximum kinetic energy of 3eV
  D) many electrons will be emitted
  Show Answer
  The correct answer is A .
• Question 2827:

  A man will exert the greatest pressurewhen he?

  Options:
  A) lies flat on his back
  B) lies on his belly
  C) stands on both feet
  D) stands on the toes of one foot
  Show Answer
  The correct answer is D .
• Question 2828: Two lamps are rated 40W and 220V each are connected in series. The total power dissipated in both lamps is Options:
  A) 10W
  B) 20W
  C) 40W
  D) 80W
  E) None of the above
  Show Answer
  The correct answer is D .
• Question 2829: A conductor has a diameter of 1.00mm and length of 2.00m. If the resistance of the material is 0.1Ω, the resistivity is Options:
  A) 2.55 * 10⁵ Ωm
  B) 2.55 * 10³ Ωm
  C) 3.93 * 10^-6 Ωm
  D) 3.93 * 10^-8 Ωm
  Show Answer
  The correct answer is D .
• Question 2830: A body is released from rest and allowed to fall freely from a given height under gravity. The kinetic energy at its half-way point is Options:
  A) a little above half of its initial energy
  B) a little below half of its initial energy
  C) a half of its initioal energy
  D) a little above its initial energy
  E) a little below its initial energy
  Show Answer
  The correct answer is C .