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 1221:

  In a radioactive series:

  ${}_{92}^{235}L{\to }_{93}^{235}M{\to }_{90}^{235}N{\to }_{90}^{235}\varphi$

  The particles emitted are respectively

  Options:
  A) $\beta \beta \alpha$
  B) $\alpha \gamma \beta$
  C) $\gamma \alpha \beta$
  D) $\alpha \alpha \beta$
  E) $\beta \alpha \beta$
  Show Answer
  The correct answer is C .
• Question 1222:

  A resistance R is connected across the terminal of an electric cell of internal resistance 2Ω and the voltage was reduced to 3/5 of its nominal value.

  The value of R is

  Options:
  A) 3 Ω
  B) 2 Ω
  C) 1 Ω
  D) 6 Ω
  Show Answer
  The correct answer is A .
• Question 1223: The lower and upper fixed points marked on a mecury-in-glass thermometer are 210mm apart. The end of the mercury column in the tube is 49mm above the lower fixed point in a room. What is the temperature of the room in degrees Celsius? Options:
  A) 55.3^oC
  B) 23.3^oC
  C) 49.0^oC
  D) 16.1^oC
  E) 76.7^oC
  Show Answer
  The correct answer is B .
• Question 1224: A 40-W instrument has a resistance of 90$\mathrm{\Omega }$. On what voltage should it be operated normally? Options:
  A) 60V
  B) 150V
  C) 225V
  D) 3600V
  Show Answer
  The correct answer is A .
• Question 1225: If the stress on a wire is 10⁷NM^-2 and the wire is stretched from its original length of 10.00 cm to 10.05 cm. The young's modulus of the wire is Options:
  A) 5 . 0 x 10⁴ Nm^-2
  B) 5 . 0 x 10⁵ Nm^-2
  C) 2 . 0 x 10⁸ Nm^-2
  D) 2 . 0 x 10⁹ Nm^-2
  Show Answer
  The correct answer is D .
• Question 1226:

  A device that converts sound energy into electrical energy is

  Options:
  A) the horn of a motor car
  B) an A.C. generator
  C) a microphone
  D) the telephone
  E) radio waves
  Show Answer
  The correct answer is C .
• Question 1227: Which of the following eye defects can be corrected using a cylindrical lens. Options:
  A) myopia
  B) Astigmatism
  C) Presbyopia
  D) Chromatic abiration
  Show Answer
  The correct answer is B .
• Question 1228: When an ebolite rod is rubbed with fur, it has Options:
  A) no charge at all
  B) a negative charge
  C) a positive charge
  D) negative and positive charges
  Show Answer
  The correct answer is B .
• Question 1229: The water at the bottom of a waterfall is slightly warmer than that at the top because part of the Options:
  A) potential energy raises the water temperature
  B) water absorbs latent heat from the atmosphere
  C) kinetic energy is changed intyo internal energy
  D) dropping mass of water increases the heat capacity
  E) A and C above
  Show Answer
  The correct answer is C .
• Question 1230:

  A boy pushes a 500kg box along a floor with a force of 2000N. If the velocity of the box is uniform, the co-efficient of friction between the box and the floor is

  Options:
  A) 1
  B) 0.8
  C) 0.65
  D) 0.4
  Show Answer
  The correct answer is D .