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 121: An electric generator has e.m.f. of 240 V and an internal resistance of 1Ω if the current supplied by the generatoris 20A when the terminal voltage is 220 V, find the ratio of the power supplied to the power dissipated? Options:
  A) 11:1
  B) 1:11
  C) 12:11
  D) 11:12
  Show Answer
  The correct answer is C .
• Question 122: A rod of length 10cm is heated through 100^oC and its final length is 10.26cm. What is the co-efficient of linear expansion of the rod? Options:
  A) 0.026 per degree centigrade
  B) 0.00026 per degree centigrade
  C) 0.26 per degree centigrade
  D) 1.0026 per degree centigrade
  E) 0.0026 per degree centigrade
  Show Answer
  The correct answer is B .
• Question 123: When impurities are added to semi-conductors, the conductivity of the semi-conductor Options:
  A) increases then decreases
  B) increases
  C) decreases
  D) remains constant
  Show Answer
  The correct answer is B .
• Question 124:

  

  The diagram above shows a meter bridge in which two of thee arms contain resistances R and 2Ω. A balance point is obtained at 60cm from the left end , calculate the value of R

  Options:
  A) 1.2Ω
  B) 1.3Ω
  C) 3.0Ω
  D) 6.0Ω
  Show Answer
  The correct answer is C .
• Question 125: When a number of identical small magnets are arranged in a line, the strength of the resultant magnet Options:
  A) ia largest when they are arranged end to end
  B) is greatest when they are arrangedparallel with like poles adjacent to each other
  C) depends only on the number of magnets provided they arev parallel
  D) is greater when the magnets are arranged on a wooden surface than on a metaln surface
  Show Answer
  The correct answer is A .
• Question 126: Convert 45°C to kelvin Options:
  A) 318K
  B) 250K
  C) 184K
  D) 120K
  Show Answer
  The correct answer is A .
• Question 127:

  How much net work is required to accelerate a 1200 kg car from 10$m{s}^{-1}$ to 15$m{s}^{-1}$

  Options:
  A) 1.95×${10}^{5}j$
  B) 1.35×${10}^{4}j$
  C) 7.5×${10}^{4}j$
  D) 6.0×${10}^{4}j$
  Show Answer
  The correct answer is C .
• Question 128: An empty density bottle weighs 2 N. if its weighs 5 N when filled with water and 4 N when filled with olive oil, the relative density of olive oil is Options:
  A) (1)/3
  B) (2)/3
  C) (1)/5
  D) (2)/5
  Show Answer
  The correct answer is B .
• Question 129: The accurate measurement of the relative density of substances in powder or granular form can be done using a beam balance and a Options:
  A) pipette
  B) burette
  C) measuring cylinder
  D) density
  E) bottle
  Show Answer
  The correct answer is E .
• Question 130: The dimension of electromotive force are ` Options:
  A) ML²T^-3I^-1
  B) ML²T^-3I^-2
  C) M²LT^-2I^-1
  D) M²L²T^-1I^-1
  Show Answer
  The correct answer is A .