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 511:

  A wire of radius 0.2 mm is extended by 0.5% of its length when supported by a load of 1.5 kg. Determine the Young's modulus for the material of the wire.

  [Take g = 10 ms${}^{-2}$]

  Options:
  A) $2.4\times {10}^{10}(N{m}^{-2})$
  B) $1.5\times {10}^{10}(N{m}^{-2})$
  C) $2.4\times {10}^9(N{m}^{-2})$
  D) $1.3\times {10}^{10}(N{m}^{-2})$
  Show Answer
  The correct answer is A .
• Question 512: The difference of potential between the terminals of cells is 2.2 volts. When a 4ohm resistor is connected across the terminals of this cells, the potential difference is 2 volts. What is the internal resistance of the cell? Options:
  A) 0.10 ohms
  B) 0.25ohms
  C) 0.40ohms
  D) 2.50ohms
  E) 4.00ohms
  Show Answer
  The correct answer is C .
• Question 513:

  The energy of a photo having a wavelength of 10^-10m is

  (h= 6.63 x 10 ^-34Js, c =3.0 x 10 ⁸ms^-1)

  Options:
  A) 2.0 x 10 ^-15J
  B) 1.7 x 10 ^-13J
  C) 2.0 x 10 ^-12J
  D) 1.7 x 10 ^-12J
  Show Answer
  The correct answer is A .
• Question 514: An ebonite rod rubbed with fur attracts a glass rod rubbed with silk because Options:
  A) ebonite has a negative charge while glass has a positive charge
  B) ebonite has a positive charge while glass has a negative charge
  C) both have negative charges
  D) both have positive charges
  Show Answer
  The correct answer is A .
• Question 515: The mass of a stone is 15.0g when completely immersed in water and 10.0g when completely immersed in a liquid of relative density 2.0. The mass of the stone in air is Options:
  A) 5.0g
  B) 12.0g
  C) 20.0g
  D) 25.0g
  Show Answer
  The correct answer is C .
• Question 516: A body which weighs 50N in air displaces 3.7kg of water when partially immersed in water. Calculate the upthrust on the body? Options:
  A) 8.7N
  B) 37.0N
  C) 87.0N
  D) 13.0N
  Show Answer
  The correct answer is B .
• Question 517: In an experiment to determine terminal velocity, as the pressure increases, the viscosity off a liquid Options:
  A) increases
  B) decreases
  C) increases then decreases
  D) remains constant
  Show Answer
  The correct answer is D .
• Question 518:

  Which of the following statements is/are correct for a freely falling body?

  I. the total is entirely kinetic

  II. the ratio of potential energy to kinetic energy is constant

  III. the sum of potential and kinetic energy is constant

  Options:
  A) I only
  B) II only
  C) III only
  D) I and III only
  Show Answer
  The correct answer is C .
• Question 519: Which of the following statements is NOT true of $\gamma$-rays? Options:
  A) $\gamma$-rays belong to the electromagnetic spectrum
  B) $\gamma$-rays do not carry an electron charge
  C) $\gamma$-rays obey the inverse cube law in air
  D) the thickness of aluminium which stops b-particule has a negligible effect on $\gamma$-radiation
  E) the difference between $\gamma$-rays and X-rays is that $\gamma$-rays originate from energy charges in the nuclei of atoms, while X-rays comes from energy charges associated with the electron structure of atoms
  Show Answer
  The correct answer is C .
• Question 520:

  When water is boiling, it

  Options:
  A) gets hotter
  B) increase is mass
  C) decreases in mass
  D) changes to steam
  Show Answer
  The correct answer is D .