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 781: A body of weight W N rest on a smooth plane inclined at an angle$\theta$^o to the horizontal. What is the resolved part of the weight in Newtons along the plane? Options:
  A) W sin$\theta$
  B) W cos$\theta$
  C) W sec$\theta$
  D) W tan$\theta$
  Show Answer
  The correct answer is A .
• Question 782: Tea pots are often silver-coated to prevent heat loss by Options:
  A) conduction only
  B) convention only
  C) convection and conduction
  D) radiation only
  Show Answer
  The correct answer is D .
• Question 783: A hydraulic press has a large circular piston of radius 0.8m and a circular plunger of radius 0.2m. A force of 500N is exerted by the plunger. Find the force exerted on the piston Options:
  A) 8000N
  B) 4000N
  C) 2000N
  D) 31N
  Show Answer
  The correct answer is D .
• Question 784: Which of the following surfaces will absorbs radiant heat energy heat? Options:
  A) white
  B) red
  C) black
  D) blue
  Show Answer
  The correct answer is C .
• Question 785: Non-luminous object can be seen because they Options:
  A) reflect light
  B) are near
  C) are polished
  D) emit light
  Show Answer
  The correct answer is A .
• Question 786:

  A metal sphere is placed on an insulating stand. A negatively charged rod is brought close to it. If the sphere is earthed and the rod is taken away, what will be the charge on the sphere?

  Options:
  A) The sphere will remain neutral.
  B) The sphere will have a net negative charge.
  C) The sphere will have a net positive charge.
  D) The sphere will become polarized
  Show Answer
  The correct answer is C .
• Question 787:

  A carpenter on top of a roof of 20.0m high dropped a hammer of mass 1.5 kg and it fell directly to the ground. the kinetic energy of the hammer just before hitting the ground is?

  [g = 10 ms^-2]

  Options:
  A) 600 J
  B) 150J
  C) 300 J
  D) 450 J
  Show Answer
  The correct answer is C .
• Question 788: It is observed that water will wet a clean glass because the Options:
  A) cohesion of water to glass is stronger than the cohesion of water molecules
  B) adhesion of water molecules is weaker than the cohesion of water to glass
  C) cohesion of water to glass is weaker than the cohesion of water molecules
  D) adhesion of water molecules is stronger than the cohesion of water molecules
  Show Answer
  The correct answer is D .
• Question 789: The heat from the sun reaches the earth by the process Options:
  A) insulation
  B) precipitation
  C) conduction
  D) convection
  E) radiation
  Show Answer
  The correct answer is E .
• Question 790: A galvanometer of resistance 20$\mathrm{\Omega }$ is to be provided with a shunt that $\frac{1}{10}$ of the whole current in a circuit passes through the galvanometer. The resistance of the shunt is Options:
  A) 2.00$\mathrm{\Omega }$
  B) 2.22$\mathrm{\Omega }$
  C) 18.00$\mathrm{\Omega }$
  D) 18.22$\mathrm{\Omega }$
  Show Answer
  The correct answer is B .