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 171:

  Which of the following is a type of wave that is both mechanical and longitudinal?

  Options:
  A) Water waves
  B) Seismic waves
  C) Sound waves
  D) Light waves
  Show Answer
  The correct answer is C .
• Question 172: 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 173: The unit of moment of a couple can be expressed in? Options:
  A) N m^-1
  B) N m^-2
  C) N m
  D) N m²
  Show Answer
  The correct answer is C .
• Question 174: A gas would serve as an electrical conductor under Options:
  A) reduced pressure and high current
  B) increased magnetic field
  C) reduced pressure and reduced potential
  D) exposure to visible light
  Show Answer
  The correct answer is A .
• Question 175:

  

  In the J-tube above, Y and X are on the same horizontal level and 30cm³ of air is trapped above Y when the atmospheric pressure is 75cm Hg, calculate the volume of air trapped above Y when 15cm Hg is now poured into the limb above X

  Options:
  A) 15 cm³
  B) 25 cm³
  C) 35 cm³
  D) 45 cm³
  Show Answer
  The correct answer is B .
• Question 176: Metal cables are used as telephone wires because Options:
  A) they are cheap
  B) they are sourced locally
  C) the speed of sound in them is very low
  D) the speed of sound in them is very high
  Show Answer
  The correct answer is D .
• Question 177:

  Which of the following will increases the boiling point of water?I. Taking it to a high altitude

  II. Dissolving a salt into it

  III. Heating it in a sealed flask

  IV. Increasing the rate of heat supply.

  Options:
  A) I only
  B) III & IV only
  C) II & III only
  D) II only
  Show Answer
  The correct answer is B .
• Question 178:

  

  From the diagram above, the measuring accuracy of the micrometer screw gauge is

  Options:
  A) 4.78mm
  B) 4.16mm
  C) 4.66mm
  D) 4.70mm
  Show Answer
  The correct answer is B .
• Question 179: A machine whose efficiency is 75% is used to lift a load of 1000N. Calculate the effort put in to the machine if it has a Velocity ratio of 4. Options:
  A) 343.32N
  B) 233.33N
  C) 333.33N
  D) 334.33N
  Show Answer
  The correct answer is C .
• Question 180: Non-luminous object can be seen because they Options:
  A) reflect light
  B) are near
  C) are polished
  D) emit light
  Show Answer
  The correct answer is A .