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 481:

  Two bodies have masses in the ratio3:1. They experience forces whichimpart to them,acceleration in the ratio 2:9 respectively. Find the ratio of forces the masses experienced

  Options:
  A) 1:4
  B) 2:1
  C) 2:3
  D) 2:5
  Show Answer
  The correct answer is C .
• Question 482: Convex mirror are used as driving mirrors because images formed are? Options:
  A) erect, virtual and diminished
  B) erect, real and diminished
  C) erect, virtual and magnified
  D) inverted virtual and diminished
  Show Answer
  The correct answer is A .
• Question 483: Which of the following statements is correct about light and sound waves? Both Options:
  A) are longitudinal waves
  B) are transverse waves
  C) have the same velocity in air
  D) need a medium for propagation
  E) transmit energy
  Show Answer
  The correct answer is E .
• Question 484: When fixed mass of an ideal gas expands at constant temperature, which property of the gas molecule increases? Options:
  A) average number per unit volume
  B) average kinetic energy
  C) average speed
  D) average seperation
  E) average number of collisions per unit time
  Show Answer
  The correct answer is E .
• Question 485:

  

  The figure above shows a conductor PQ carrying a current I in the direction shown. At a particular position near the conductor is a compass needle K. Neglecting the earth's magnetic field, the compass needle will

  Options:
  A) settle in any direction
  B) settle in a fixed direction only if the conductor PQ is a magnetic material
  C) settle in a fixed direction WHETHER the conductor PQ is a magnetic material OR NOT
  D) be stationary
  Show Answer
  The correct answer is C .
• Question 486: Which of the following is a semiconductor Options:
  A) copper
  B) silicon
  C) plastic
  D) Iron
  Show Answer
  The correct answer is B .
• Question 487: Two similar kettles containing equal masses of boiling water are placed on a table. If the surface of one is highly polished and the surface of the other is covered with soot, Which of the following observations is correct Options:
  A) The two kettles will cool down at the same rate
  B) the polished kettle cools down more quickly by conduction
  C) the kettle covered with soot cools down more quickly because it is a good radiator
  D) the kettle covered with soot cools down more quickly by the process of heat convection
  Show Answer
  The correct answer is C .
• Question 488: A p-n junction diode is used as? Options:
  A) a rectifier in a d.c circuit
  B) an amplifier in d.c circuit
  C) an anplifier in an a.c circuit
  D) a rectifier in an a.c circuit
  Show Answer
  The correct answer is D .
• Question 489: 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 490: The speed of light in vacuum is 3.0 x 10⁸ms^-1. If the refractive index of a transparent liquid is $\frac{4}{3}$, then the speed of light in the liquid is Options:
  A) 0.44 x 10 ⁸ms^-1
  B) 2.25 x 10 ⁸ms^-1
  C) 3.0 x 10 ⁸ms^-1
  D) 4.0 x 10 ⁸ms^-1
  E) 4.33 x 10 ⁸ms^-1
  Show Answer
  The correct answer is B .