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 241:

  

  In the diagram above a beam of white light travels from a rare to a dense medium. What colours of light do the rays a, b and c respectively represents?

  Options:
  A) red, green and blue
  B) Green, red and blue
  C) Yellow , blue and red
  D) Blue , yellow and red
  Show Answer
  The correct answer is A .
• Question 242: Which statement is a correct consequence of the uncertainly principle? Options:
  A) A particle’s kinetic energy cannot be measured accurately at any time
  B) Both momemtum and energy of a particle can be known with absolute certainly
  C) It is possible to measure exactly both the position and momentum of a particle at the same time
  D) The complete knowledge of the position of a particle implies the complete ignorance of its energy
  E) The uncertainty in our knowledge of energy and the duration taken to measure it, are each less than Planck’s constant.
  Show Answer
  The correct answer is A .
• Question 243: An object weighing 0.60N is hung on a spiral spring and caused it to extend by 6.0cm. The object is removed and a black of wood replacing it causes the spring to extend by 10.0cm. What is the weight of the block of wood? Options:
  A) 0.10N
  B) 0.36N
  C) 0.80N
  D) 1.00N
  E) 3.60N
  Show Answer
  The correct answer is D .
• Question 244: A certain radioisotope of ${}_{92}^{235}U$ emits four alpha particles and three beta particles. The mass number and the atomic number of the resulting elements respectively are Options:
  A) 219 and 87
  B) 84 and 223
  C) 223 and 87
  D) 219 and 81
  Show Answer
  The correct answer is A .
• Question 245:

  The motion of a body is simple harmonic if the?

  Options:
  A) acceleration is always directed towards a fixed point
  B) path of motion is a straight line
  C) acceleration is proportional to the square of the distance from a fixed point
  D) acceleration is constant and directed towards a fixed point
  Show Answer
  The correct answer is A .
• Question 246:

  Neutrons were discovered by

  Options:
  A) Faraday
  B) Dalton
  C) James Chadwick
  D) Rutherford
  Show Answer
  The correct answer is C .
• Question 247: The image is a plane mirror is Options:
  A) inverted, real with a magnificant of $\frac{1}{2}$
  B) inverted, virtual with a magnification of 1
  C) inverted, real with a magnification of 2
  D) upright, virtual with a magnificent of 1
  E) upright, real with a magnification of 2
  Show Answer
  The correct answer is D .
• Question 248: Heat is supplied uniformly at the rate of 100W to 1.0 x 10^-2kg of a liquid for 20 seconds. If the temperature of the liquid rises by 5^oC, then the specific heat capacity of the liquid is Options:
  A) 2.0 x 10²Jkg^-1k^-1
  B) 2.0 x 10²Jkg^-1
  C) 4.0 x 10⁴Jkg^-1k^-1
  D) 4.0 x 10⁴kg^-1
  E) 8.4 x 10³Jkg^-1k^-1
  Show Answer
  The correct answer is C .
• Question 249: What will happen to the boiling point of pure water when it is heated in a place 30m below sea level? Options:
  A) It will be more than 100 ^oC
  B) It will be last than 100 ^oC
  C) It will still be at 100 ^oC
  D) It will be fluctuating
  Show Answer
  The correct answer is A .
• Question 250: The sign of the change on a charged glass rod may be determined with Options:
  A) a charged electroscope
  B) an uncharged electroscope
  C) a galvanometer
  D) an electrometer
  Show Answer
  The correct answer is A .