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 371: The major difference between a pure semiconductor and a pure metal is that Options:
  A) metals are harder than semiconductor
  B) while resistance of metals decrease with temperature , the reverse is the case for semiconductor
  C) the resistance of metals increases with temperature, while for semiconductors, it is the reverse
  D) metals have forbidden gaps while semiconductors have not
  Show Answer
  The correct answer is C .
• Question 372:

  

  Two taxis leave Benin and Agbor some 80km apart at 1200hr as shown above. from the distance time graph shown the distance of their meeting point P, from Benin and the time of their meeting are

  Options:
  A) 27km, 1218hr
  B) 29km, 1315hr
  C) 40km, 1418hr
  D) 53km, 1436hr
  E) 60km, 1500hr
  Show Answer
  The correct answer is B .
• Question 373: When an alternating current given by I = 10sin (120π)t passes through a 12Ω resistor, the power dissipated in the resistor is Options:
  A) 1200W
  B) 600W
  C) 120W
  D) 30W
  Show Answer
  The correct answer is A .
• Question 374: Which of the following statements is correct about a machine? Options:
  A) Efficiency of a machine is always greater than I
  B) Efficiency decreases with an increase in friction
  C) Velocity ratio depends on friction
  D) Mechanical advantage increases with an increase in friction
  Show Answer
  The correct answer is B .
• Question 375:

  In Sunlight, a blue flower looks blue because we see the flower by the light it

  Options:
  A) receives from our eyes
  B) disperses
  C) absorbed
  D) reflect
  Show Answer
  The correct answer is D .
• Question 376: In the Rutherford scattering experiment, a beam of alpha particles was fired at a thin gold film with some of the particles being considerably deflected. This shows that Options:
  A) a gold nucleus contains protons, neutrons and electrons uniformly distributed in a tiny volume
  B) the gold nucleus is positively charged and is concentrated in a tiny volume
  C) the gold nucleus emitted alpha particles
  D) the gold nucleus is concentrated in a tiny volume and contains alpha particles
  Show Answer
  The correct answer is B .
• Question 377: Calculate the work done in charging a capacitor of capacitance 20µF through a potential difference of 1000V. Options:
  A) 0.02 J
  B) 0.10 J
  C) 0.20 J
  D) 1.00 J
  E) 10.00 J
  Show Answer
  The correct answer is E .
• Question 378: An object is placed 10m from a pinhole camera of length 25cm. Calculate the linear magnification. Options:
  A) 2.5x10²
  B) 2.5x10^-2
  C) 2.5x10^-1
  D) 2.5x10¹
  Show Answer
  The correct answer is B .
• Question 379:

  

  In the diagram above, a rod 50 cm long of uniform cross-section is suspended horizontally on a fulcrum, F, by the action of two forces. What is the weight of the rod?

  Options:
  A) 40N
  B) 80N
  C) 120N
  D) 200N
  Show Answer
  The correct answer is B .
• Question 380: The ability of the eye to focus on objects at various distances is known as Options:
  A) accommodation
  B) astigmatism
  C) eye ring
  D) myopia
  E) presbyopia
  Show Answer
  The correct answer is A .