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 211: The instrument used by designers to obtain different color pattern is called? Options:
  A) periscop
  B) sextant
  C) episcope
  D) kaleidoscope
  Show Answer
  The correct answer is D .
• Question 212: An electric water pump rate 1.5 kW, lifts 200kg of water through a vertical height of 6 meters in seconds. What is the efficiency of the pump? [g = 10ms^-2, neglecting air resistance] Options:
  A) 90.0%
  B) 85.0%
  C) 80.0%
  D) 65.0%
  Show Answer
  The correct answer is C .
• Question 213: A rocket burns 0.01kg of fuel each second and ejects it as a gas with a velocity of 5,000m/s. What force does the gas exert on the rocket? Options:
  A) 500,000N
  B) 500N
  C) 50N
  D) 5,000N
  E) 50,000N
  Show Answer
  The correct answer is C .
• Question 214: If the refractive index of crown glass is 1.51, its critical angel is. Options:
  A) 48.6°
  B) 22.5°
  C) 41.5°
  D) 45.0°
  Show Answer
  The correct answer is C .
• Question 215: If the fundamental frequency of a closed pipe organ on a day when the speed of sound is 340ms^-1 is 170Hz, then the length of the pipe is Options:
  A) 50cm
  B) 70cm
  C) 100cm
  D) 150cm
  E) 200cm
  Show Answer
  The correct answer is A .
• Question 216:

  A microscope is focused on a mark on a table, when the mark is covered by a plate of glass 2m thick, the microscope has to be raised 0.67cm for the mark to be once more in focus. Calculate the refractive index.

  Options:
  A) 1.52
  B) 1.68
  C) 2.58
  D) 1.82
  Show Answer
  The correct answer is A .
• Question 217: What is the best method of demagnetizing a steel bar magnet? Options:
  A) Hammering
  B) Heating it
  C) Rough handling it
  D) Solenoid method
  Show Answer
  The correct answer is D .
• Question 218:

  A person standing waist-deep in a swimming pool appears to have short legs because of light?

  Options:
  A) diffraction
  B) refraction
  C) reflection
  D) interference
  Show Answer
  The correct answer is B .
• Question 219: 250g of lead at 170^oC is dropped into 100g of water at 0^oC. If the final temperature is 12^oC, the specific heat of lead is (specific heat of water is 4,200J/kg^oC) Options:
  A) 39.5J/kg^oC
  B) 50.4J/kg^oC
  C) 127.6J/kg^oC
  D) 154.6J/kg^oC
  E) 173.4J/kg^oC
  Show Answer
  The correct answer is C .
• Question 220:

  

  In the diagram above, a 200 W bulb is lighted by a 240 V a.c mains supply. If 1kwh is sold at ₦40, the cost of keeping the bulb lighted for a day is

  Options:
  A) ₦1,920.00
  B) ₦192.00
  C) ₦19.20
  D) ₦1.92
  Show Answer
  The correct answer is B .