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 531: If a solid changes directly into a gas when heat is applied the process is called Options:
  A) vaporization
  B) evaporation
  C) sublimation
  D) ionization
  E) conversion
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  The correct answer is C .
• Question 532: Which of the following statements is CORRECT? Options:
  A) charges generated on glass rubbed with silk are called negative
  B) charges in various media can be carried by protons detached from their atom
  C) the magnitude of any charge is a multiple of the charge of an electron
  D) the intensity of an electric field is a scalar quantity
  E) if 500 joules of work are required to move a 2-coulomb charge between two points, the potential difference between the two point is 100V
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  The correct answer is C .
• Question 533: Two liquids X and Y having the same mass are supplied with the same quantity of heat. If the temperature rise in X is twice that of Y, the ratio of specific heat capacity of X to that of Y is Options:
  A) 2:1
  B) 1:2
  C) 4:1
  D) 1:4
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  The correct answer is A .
• Question 534: A 40-W instrument has a resistance of 90$\mathrm{\Omega }$. On what voltage should it be operated normally? Options:
  A) 60V
  B) 150V
  C) 225V
  D) 3600V
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  The correct answer is A .
• Question 535: An elevator of mass 4800kg is supported by a cable which can safely withstand a maximum tension of 60 000N. The maximum upward acceleration the elevator can have is Options:
  A) 2.5ms^-2
  B) 5.0ms^-2
  C) 7.5ms^-2
  D) 10.0ms^-2
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  The correct answer is A .
• Question 536:

  

  E, F and G are yellow, red and cyan transparent light filters respectively. The color of a white opaque object when viewed through the arrangement of the filters above is

  Options:
  A) yellow
  B) red
  C) black
  D) blue
  Show Answer
  The correct answer is C .
• Question 537: If the volume of a gas is recoded as 76cm³ at a temperature of 27°C with a pressure of 800mmHg. What will be the volume of the gas at S.T.P? Options:
  A) 36.2cm³
  B) 25.7cm³
  C) 72.8cm³
  D) 24.3cm³
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  The correct answer is C .
• Question 538: The plane mirrors in a kaleidoscope are usually placed Options:
  A) at an angle of 60^o
  B) parallel to one another
  C) perpendicular to one another
  D) at an angle of 45^o
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  The correct answer is A .
• Question 539: How much heat is absorbed when a block of copper of mass 0.05kg and specific heat capacity 390Jkg^-1K^-1 is heated from 20^oC to 70^oC? Options:
  A) 39 . 98 x 10^-1J
  B) 9.75 x 10²J
  C) 3.98 x 10³J
  D) 9.75 x 10³J
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  The correct answer is B .
• Question 540: Total internal reflection will not occur when light travels from Options:
  A) water to air
  B) water into glass
  C) glass to air
  D) glass into water
  Show Answer
  The correct answer is B .