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 421: Which of the following instruments has a pure tone? Options:
  A) guitar
  B) vibrating strings
  C) tuning fork
  D) siren
  Show Answer
  The correct answer is C .
• Question 422: A substance has a half of 3mins. after 6mins. the count rate was observed to be 400. What was its count rate at zero time? Options:
  A) 200
  B) 1200
  C) 1600
  D) 2400
  Show Answer
  The correct answer is C .
• Question 423:

  A hydrometer is an instrument formeasuring the

  Options:
  A) a depth of water of water in a vessel
  B) relative density of a liquid by the method of flotation
  C) relative density of a liquid by finding the apparent loss in weight
  D) relative humidity of the air
  Show Answer
  The correct answer is B .
• Question 424:

  

  The diagram above shows a closed side 0.5m in a uniform electric field E in the direction shown by the arrows. What is the flux Φ for the box?

  Options:
  A) 0.5 E
  B) 2.0 E
  C) 0.2 E
  D) 0.0 E
  Show Answer
  The correct answer is D .
• Question 425:

  

  In the circuit above, The potential across each capacitor is 100V. The total energy stored in the two capacitors is

  Options:
  A) 3.0 x 10⁴J
  B) 3.0 x 10²J
  C) 2.5 x 10^-2J
  D) 6.0 x 10^-3J
  Show Answer
  The correct answer is C .
• Question 426:

  A body moves in SHM between two point 20m on the straight line Joining the points. If the angular speed of the body is 5 rad/s. Calculate its speed when it is 6m from the center of the motion.

  Options:
  A) 20 m/s
  B) 30 m/s
  C) 40 m/s
  D) 50 m/s
  Show Answer
  The correct answer is C .
• Question 427: The energy stored in a capacitor of capacitance 10μF carrying a charge of 100μC Options:
  A) 5 x 10⁴ J
  B) 4 x 10² J
  C) 4 x 10^-3 J
  D) 5 x 10^-4 J
  Show Answer
  The correct answer is D .
• Question 428: When a pentavalent impurity is added to a pure semiconductor, it becomes Options:
  A) a p-type semiconductor
  B) an n-type semiconductor
  C) an insulator
  D) an intrinsic semi-conductor
  Show Answer
  The correct answer is B .
• Question 429: The latent heat of fusion of a substance is the heat required to Options:
  A) raise the temperature of unit mass of the substance by 1 ^oC
  B) maintain unit mass of the substance at constant temperature
  C) change unit mass of substance from solid to liquid at constant temperature
  D) change unit mass of liquid to vapour at constant temperature
  E) raise the temperature of unit mass by 100^oC
  Show Answer
  The correct answer is C .
• Question 430: Volatile liquids usually Options:
  A) Have high boiling points
  B) have low boiling points
  C) have high densities
  D) have high melting points
  Show Answer
  The correct answer is B .