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 1781: The eyeball consists of a round tough white skin called Options:
  A) Sclerotic
  B) Choroid coal
  C) Optical fiber
  D) Accommodation
  Show Answer
  The correct answer is A .
• Question 1782:

  

  What is the resistance of the circuit shown above

  Options:
  A) 4Ω
  B) 11Ω
  C) 19/5Ω
  D) 17/4Ω
  E) 8Ω
  Show Answer
  The correct answer is E .
• Question 1783:

  A certain manufacturer wishes to make an n-type semiconductor. Which materials would he select for doping?

  Options:
  A) boron and antimony
  B) aluminium and antimony
  C) aluminium and indium
  D) arsenic and antimony
  Show Answer
  The correct answer is D .
• Question 1784:

  If the fraction of the atoms of a radioactive material left after 120 years is 1/64, what is the half-life of the material?

  Options:
  A) 24 years
  B) 20 years
  C) 10 years
  D) 2 years
  Show Answer
  The correct answer is B .
• Question 1785:

  

  A simple pendulum of mass m moves along an arc pf a circle radius R in a vertical plane as shown above. What is the work done by gravity in a downward swing through the angle q to 0 degree

  Options:
  A) mgR sinθ
  B) MgR (1- cos θ)
  C) mgR
  D) mgR (1 - sinθ)
  Show Answer
  The correct answer is B .
• Question 1786: The device in which one circuit controls another, especially if the current in the second circuit is large or dangerous is known as Options:
  A) Electromagnetic devices
  B) Magnetic relay device
  C) None at all
  D) Sextant
  Show Answer
  The correct answer is B .
• Question 1787: A radioactive substance has a half life of 20 days. What fraction of the original radioactive nuclei will remain after 80 days? Options:
  A) $\frac{1}{32}$
  B) $\frac{1}{16}$
  C) $\frac{1}{8}$
  D) $\frac{1}{4}$
  Show Answer
  The correct answer is B .
• Question 1788: An element X of an atomic number 88 and mass number 226 decays to form an element Z by emitting two beta particles and an alpha particle. Z is represented by Options:
  A) ${}_{82}^{222}Z$
  B) ${}_{88}^{222}Z$
  C) ${}_{86}^{226}Z$
  D) ${}_{80}^{226}Z$
  Show Answer
  The correct answer is B .
• Question 1789:

  The pin-hole camera produces a less sharply defined image when the

  Options:
  A) pin-hole is larger
  B) illumination is less
  C) screen is further from the pin-hole
  D) object is further from the pin-hole
  Show Answer
  The correct answer is A .
• Question 1790:

  

  In the diagram above, the pressure of the gas is

  Options:
  A) 86 cm of mercury
  B) 66 cm of mercury
  C) 96 cm of mercury
  D) 76 cm mercury
  Show Answer
  The correct answer is A .