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 1571: Two long parallel wires X and Y carry currents 3A and 5A each. if the force experienced by unit length is 5 x 10^-5N. the force per unit length experienced by wire Y is Options:
  A) 3 x 10^-5
  B) 3 x 10^-6
  C) 5 x 10⁵
  D) 5 x 10^-5
  Show Answer
  The correct answer is D .
• Question 1572: A heating coil rated at 100W is used to boil off 0.5kg of boiling water. The time taken to boil off the water is [specific latent heat of vaporization of water = 2.3 x 10⁶Jkg^-1] Options:
  A) 1.15 x 10⁹ s
  B) 1.15 x 10⁷ s
  C) 1.15 x 10⁵ s
  D) 1.15 x 10⁴ s
  Show Answer
  The correct answer is D .
• Question 1573: In a resonance tube experiment, if the fundamental frequency of the vibrating air column is 280Hz, the frequency of the third overtone is Options:
  A) 70Hz
  B) 840Hz
  C) 1120Hz
  D) 1960Hz
  Show Answer
  The correct answer is D .
• Question 1574:

  When a brick is taken from the earth's surface to the moon, its mass

  Options:
  A) Remains constant
  B) Becomes zero
  C) Reduces
  D) increases
  Show Answer
  The correct answer is A .
• Question 1575:

  Which process is responsible for production of energy in stars?

  Options:
  A) Nuclear reaction
  B) Nuclear fission
  C) Nuclear fusion
  D) Radioactive decay
  Show Answer
  The correct answer is C .
• Question 1576: Two bodies X and Y are projected on the same horizontal plane, with the same initial speed but at angles 30 and 60 respectively to the horizontal. Neglecting air resistance, the ratio of the range of X to that of Y is Options:
  A) 1:1
  B) 1:2
  C) √3:1
  D) √3
  Show Answer
  The correct answer is A .
• Question 1577: The number of neutrons contained in the nucleus ${}_{92}^{238}U$ is Options:
  A) 92
  B) 146
  C) 238
  D) 330
  Show Answer
  The correct answer is B .
• Question 1578: The lowest note emitted by a stretched string has a frequency of 40Hz. How many overtones are there between 40Hz and 150Hz? Options:
  A) 1
  B) 2
  C) 3
  D) 4
  Show Answer
  The correct answer is A .
• Question 1579: A vapour is said to be saturated when Options:
  A) a dynamic equilibrium exists between liquid molecules and the vapour molecules
  B) a dynamic aquilibrium exists such that more molecules return to the liquid than are living it
  C) the temperature of the vapour varies
  D) the vapour pressure is atmospheric
  Show Answer
  The correct answer is A .
• Question 1580:

  

  In which of the points labelled A, B, C, D and E on the conductor shown would electric charge tend to concentrate most

  Options:
  A) A
  B) B
  C) C
  D) E
  Show Answer
  The correct answer is D .