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 2331: The mechanism of heat transfer from one point to another through the vibration of the molecules of the medium is Options:
  A) covection
  B) conduction
  C) radiation
  D) diffusion
  Show Answer
  The correct answer is B .
• Question 2332: A heating coil rated 1000 W is used to boil off completely 2 kg of boiling water. the time required to boil of the water is_______[Special latent heat of Vaporization of water = 2.3 x 10⁶ Jkg^-1] Options:
  A) 1.15 x 10⁴s
  B) 1.15 x 10³s
  C) 4.6 x 10⁴s
  D) 4.6 x 10³s
  Show Answer
  The correct answer is D .
• Question 2333: A force F required to keep a 5 kg mass moving round a cycle of radius 3.5 m at a speed of 7 ms^-1. What is the speed, if the force is tripled? Options:
  A) 4.0 ms^-1
  B) 6.6 ms^-1
  C) 12.1 ms^-1
  D) 21.0 ms^-1
  Show Answer
  The correct answer is C .
• Question 2334: Change of state is accompanied by change of Options:
  A) temperature
  B) volume
  C) heat content
  D) temperatureb and volume
  E) volume and heat content
  Show Answer
  The correct answer is C .
• Question 2335: The water at the bottom of a waterfall is slightly warmer than that at the top because part of the Options:
  A) potential energy raises the water temperature
  B) water absorbs latent heat from the atmosphere
  C) kinetic energy is changed intyo internal energy
  D) dropping mass of water increases the heat capacity
  E) A and C above
  Show Answer
  The correct answer is C .
• Question 2336: In fleming's right-hand rule, the thumb, the forefinger and the middle finger if held mutually at right angles represent respectively, the Options:
  A) motion, the field and the induced current
  B) induced current, the motion and the field
  C) field, the induced current and the motion
  D) induced current, the field and the motion
  Show Answer
  The correct answer is A .
• Question 2337: A series RLC circuit is said to resonate, when Options:
  A) capacitive reactance is zero
  B) conductance is maximum
  C) current is minimum
  D) impedance is minimum
  E) inductive reactance is zero
  Show Answer
  The correct answer is D .
• Question 2338:

  Which of the following instruments may be used to measure relative humidity?

  Options:
  A) Hydrometer
  B) Manometer
  C) Hygrometer
  D) Hypsometer
  Show Answer
  The correct answer is C .
• Question 2339: Calculate the critical angle for light travelling from water to air. (Refractive index of water = 1.33) Options:
  A) 36.9°
  B) 41.3°
  C) 48.8°
  D) 49.2°
  E) 51.4°
  Show Answer
  The correct answer is C .
• Question 2340: The absolute temperature of a perfect gas is proportional to the average Options:
  A) potential energy of the molecules
  B) seperation between the molecules
  C) kinetic energy of the molecules
  D) velocity of the molecules
  Show Answer
  The correct answer is C .