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 1891:

  The temperature gradient across a copper rod of thickness 0.02m, maintained at two temperature junctions of 20º and 80ºC respectively is?

  Options:
  A) 3.0 x 10${}^2$km${}^{-1}$
  B) 3.0 x 10${}^3$km${}^{-1}$
  C) 5.0 x 10${}^3$km${}^{-1}$
  D) 3.0 x 10${}^4$km${}^{-1}$
  Show Answer
  The correct answer is B .
• Question 1892: which of the following statements are TRUE of isotopes? i. isotopes of an element have the same chemical properties because they have the same number of electrons. ii. isotopes of elements are normally separated using physical properties. iii. isotopes of an element have the same number of protons in their nuclei. Options:
  A) i and ii only
  B) i and iii only
  C) ii and iii only
  D) i, ii, and iii
  Show Answer
  The correct answer is B .
• Question 1893:

  

  The diagram above shows a solid figure with base PQ and center of gravity G on a inclined plane. Which of the following statements is correct

  Options:
  A) The solid will fall over if the vertical line through G lies outside the base
  B) The solid will fall over if the vertical line through lies inside the base
  C) The solid will not fall over if the vertical line through G lies outside the base
  D) The solid can never fall over
  Show Answer
  The correct answer is A .
• Question 1894: An ammeter of resistance 5Ω has a full-scale deflection when a current of 50 mA flows in it. The value of the resistor required to adapt it to measure a current of 5 A is? Options:
  A) 0.25Ω
  B) 5.00Ω
  C) 19.80Ω
  D) 0.05Ω
  Show Answer
  The correct answer is D .
• Question 1895:

  The Earth's magnetic equator passes through Jos in Nigeria. At Jos, the

  Options:
  A) angle of variation is zero
  B) magnetic declination is 90
  C) angle of dip is zero
  D) horizontal component at the Earth's field is zero
  Show Answer
  The correct answer is C .
• Question 1896:

  

  The current I in the fig above is

  Options:
  A) 4.00A
  B) 1.30A
  C) 0.80A
  D) 0.75A
  Show Answer
  The correct answer is A .
• Question 1897: A cone in an unstable equilibrium has its potential energy Options:
  A) decreased
  B) increased
  C) unchanged
  D) oscillating
  Show Answer
  The correct answer is B .
• Question 1898:

  If a force of 50N stretches a wire from 20m to 20.01m, what is the amount of force required to stretch the same material from 20m to 20.05m?

  Options:
  A) 250N
  B) 200N
  C) 100N
  D) 50N
  Show Answer
  The correct answer is A .
• Question 1899: Electrical power is transmitted at a high voltage rather than low voltage because the amount of energy loss is reduced due to Options:
  A) heat dissipation
  B) production of eddy currents
  C) excessive current discharge
  D) excessive voltage distance
  Show Answer
  The correct answer is A .
• Question 1900: The echo of a sounder from the bottom of an ocean is heard 2.5 seconds later. If the speed of sound in water is 1,400ms^-1, the depth of the ocean is Options:
  A) 1,750m
  B) 3,500m
  C) 1,400m
  D) 2,800m
  E) 2,100m
  Show Answer
  The correct answer is A .