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 981: The threshold of frequency for photoelectric effect depends on the Options:
  A) intensity of incident light
  B) frquency of incident light
  C) material of the photocathode
  D) potential difference between the cathode and the anode
  Show Answer
  The correct answer is C .
• Question 982: A metal cube of volume 10³mm³ is lowered into a measuring cylinder containing water. If the internal cross-sectional area of the cylinder is 1.5 x 10²mm², by how much does the water level rise in the cylinder? Options:
  A) 6.67 x 10⁰mm
  B) 8.50 x 10²mm
  C) 1.15 x 10³mm
  D) 2.50 x 10³mm
  E) 1.50 x 10⁵mm
  Show Answer
  The correct answer is A .
• Question 983: A body of mass 36kg falls through a viscous liquid which offers a drag force of 260N on the body. The upthrust on the body at terminal velocity is?
  [g = 10ms²] Options:
  A) 100N
  B) 620N
  C) 50N
  D) 310N
  Show Answer
  The correct answer is A .
• Question 984:

  

  The equivalent capacitance for the circuit drawn above is

  Options:
  A) 18µf
  B) 4µf
  C) 2µf
  D) 12µf
  E) 13µf
  Show Answer
  The correct answer is B .
• Question 985: The production of pure spectrum could easily be achieved using a? Options:
  A) glass prism with a pin
  B) triangular prism with two convex lens
  C) traingular prism only
  D) triangular prism with two concave lenses
  Show Answer
  The correct answer is B .
• Question 986: The direction of the magnetic field at a point in the vicinity of a bar magnet is Options:
  A) always towards the north pole of the magnet
  B) always away from the south pole of the magnet
  C) along the line joining the point to the neutral point
  D) in the direction the north pole of a compass needle would point
  Show Answer
  The correct answer is D .
• Question 987:

  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 988: A silicon material is dopped with an element of a certain group and an n-type semi-conductor is formed. the most likely group of the element is Options:
  A) V
  B) III
  C) I
  D) II
  Show Answer
  The correct answer is A .
• Question 989: Which of the following does Not use magnetic effect of current to function? Options:
  A) Lead acid accumulator
  B) An electric bell
  C) A moving coil galvanometer
  D) A telephone receiver
  Show Answer
  The correct answer is A .
• Question 990:

  

  The figure above shows a block of mass m sliding down a rough inclined plane QP at angle $\theta$ . The forces acting on the block along QP are

  Options:
  A) mg sinθ and the normal reaction
  B) mg sinθ and the force of friction
  C) mg sinθ and the normal reaction
  D) mg cosθ and the normal reaction
  Show Answer
  The correct answer is B .