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 641: 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 642:

  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 643:

  

  From the diagram above, determine the value of the resistance X

  Options:
  A) 6Ω
  B) 9Ω
  C) 12Ω
  D) 15Ω
  Show Answer
  The correct answer is D .
• Question 644:

  Electrons were discovered by

  Options:
  A) Dalton
  B) James Charwick
  C) J.J. Thompson
  D) Niels Bohr
  Show Answer
  The correct answer is C .
• Question 645: Dispersion occurs when white light passes through a glass prism because of the Options:
  A) different hidden colours in the glass
  B) different speeds of the colour in the glass
  C) defects in the glass
  D) high density of the glass
  Show Answer
  The correct answer is B .
• Question 646: The quantity (timbre) of sound depends on Options:
  A) amplitude
  B) frequency
  C) harmonics
  D) velocity
  E) wavelength
  Show Answer
  The correct answer is C .
• Question 647: Which of the following types of motion is/are exhibited by a cylindrical drum rolling down an incline plane? Options:
  A) Random and rotational
  B) Rotational and oscillatory
  C) Rotational only
  D) Translations only
  E) Translational and rotational
  Show Answer
  The correct answer is E .
• Question 648: An arrow of mass 0.1kg moving with a horizontal velocity of 15ms^-1 is shot into a wooden block of mass 0.4kg lying at rest on a smooth horizontal surface. Their common velocity after impact is Options:
  A) 15.0 ms^-1
  B) 7.5 ms^-1
  C) 3.8 ms^-1
  D) 3.0 ms^-1
  Show Answer
  The correct answer is D .
• Question 649: A rectangular metal block of volume 10^-6m³ at 273k is heated to 573k. If its coefficient of linear expansion is 1.2 x 10^-5k^-1, the percentage change of it volume is Options:
  A) 1.5%
  B) 1.1%
  C) 0.4%
  D) 0.1%
  Show Answer
  The correct answer is B .
• Question 650:

  

  In the figure above, XY is of length 1m, The value of R at balance point Z is

  Options:
  A) 3.0Ω
  B) 13.3Ω
  C) 15.0Ω
  D) 30.0Ω
  Show Answer
  The correct answer is D .