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 181: An object placed 10cm from a concave mirror of focal length 5cm would have its image Options:
  A) at the centre of convature
  B) at the radius of curvature
  C) at infinity
  D) 10 cm from the focus
  Show Answer
  The correct answer is A .
• Question 182: The instrument used by designers to obtain different color pattern is called? Options:
  A) periscop
  B) sextant
  C) episcope
  D) kaleidoscope
  Show Answer
  The correct answer is D .
• Question 183:

  If the fraction of the atoms of a radioactive material left after 120 years is 1/64, what is the half-life of the material?

  Options:
  A) 24 years
  B) 20 years
  C) 10 years
  D) 2 years
  Show Answer
  The correct answer is B .
• Question 184: A body of mass 4kg is acted on by a constant force of 12N for 3 seconds. The kinetic energy gained by the body at the end of the time is Options:
  A) 144J
  B) 162J
  C) 81J
  D) 72J
  Show Answer
  The correct answer is B .
• Question 185: Heat transfer by convection will take place is one the following substance. Options:
  A) Stone
  B) Wood
  C) Mercury
  D) Water
  Show Answer
  The correct answer is D .
• Question 186:

  The eclipse of the moon occurs when?

  Options:
  A) the moon reflects the rays from the sun to the earth
  B) the moon comes exactly between the earth and the sun
  C) the earth comes exactly between the moon and the sun
  D) the sun comes exactly between the earth and the moon
  Show Answer
  The correct answer is C .
• Question 187:

  Particles of mass 10${}^{-2}$kg is fixed to the tip of a fan blade which rotates with angular velocity of 100rad${}^{-1}$. If the radius of the blade is 0.2m, the centripetalforce is?

  Options:
  A) 2N
  B) 20N
  C) 200N
  D) 400N
  Show Answer
  The correct answer is B .
• Question 188: Which of the following are found in the receiver but not in the microphone of a telephone handset? i. Diaphragm. ii. soft iron pole pieces. iii. permanent magnet. iv.carbon blocks Options:
  A) i and ii
  B) i and iv
  C) ii and iii
  D) iii and iv
  Show Answer
  The correct answer is B .
• Question 189:

  A wire of radius 0.2 mm is extended by 0.5% of its length when supported by a load of 1.5 kg. Determine the Young's modulus for the material of the wire.

  [Take g = 10 ms${}^{-2}$]

  Options:
  A) $2.4\times {10}^{10}(N{m}^{-2})$
  B) $1.5\times {10}^{10}(N{m}^{-2})$
  C) $2.4\times {10}^9(N{m}^{-2})$
  D) $1.3\times {10}^{10}(N{m}^{-2})$
  Show Answer
  The correct answer is A .
• Question 190:

  

  In the diagram above, if the internal resistance of the cell is zero, the ration of the powers P₁ and P₂ dissipated by R₁ and R₂

  Options:
  A) ^R₂/_R1
  B) ^R₁/_R2
  C) ^R₁+R₂/_R1
  D) ^R₁+R₂/_R2
  Show Answer
  The correct answer is A .