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 861:

  A 500W heater is used to heat 0.6kg of water from 25^oC to 100^oC in t₂ seconds. If another 1000W heater is used to heat 0.2kg of water from 10^oC to 100^oC in t, seconds, find $\frac{t_1}{t_2}$

  Options:
  A) 50
  B) 5
  C) 5/4
  D) 1/5
  Show Answer
  The correct answer is D .
• Question 862: When a brick is taken from the earth's surface to the moon, its mass Options:
  A) remains constant
  B) reduces
  C) increases
  D) becomes zero
  Show Answer
  The correct answer is A .
• Question 863:

  

  The diagram above represents the stress-strain graph for a typical metal rod. What does the X represent?

  Options:
  A) Breaking point
  B) Yield point
  C) Elastic limit
  D) Proportional limit
  Show Answer
  The correct answer is A .
• Question 864: The phenomenon of photoelectric effect is NOT used in Options:
  A) automatic doors
  B) bimetallic strip thermometers
  C) light meters in cameras
  D) setting off burglar alarms
  E) sound production from film tracks.
  Show Answer
  The correct answer is B .
• Question 865: A wave is represented by the equation y = 0.5 sin 0.4 Ω(X - 60t), where the distance (X) is measured in centimetres and time (t) in seconds. What is the wave length of the wave? Options:
  A) 0.2cm
  B) 0.4cm
  C) 0.8cm
  D) 5.0cm
  E) 10.0cm
  Show Answer
  The correct answer is D .
• Question 866: In a resonance tube experiment, a tube fixed length is closed at one end and several tuning forks of increasing frequency used to obtain resonance at the open end. If the tuning fork with the lowest frequency which gave resonance had a frequency f₁ and the next tuning fork to give resonance had a frequency f₂, find the ratio $\frac{f^2}{f^2}$. Options:
  A) 8
  B) 3
  C) 2
  D) $\frac{1}{2}$
  E) $\frac{1}{3}$
  Show Answer
  The correct answer is B .
• Question 867: The quantity (timbre) of sound depends on Options:
  A) amplitude
  B) frequency
  C) harmonics
  D) velocity
  E) wavelength
  Show Answer
  The correct answer is C .
• Question 868: Electric charges on the surface of a conductor would be most evenly distributed if the shape of the conductor is Options:
  A) conical
  B) cubical
  C) cylindrical
  D) parabolic
  E) spherical
  Show Answer
  The correct answer is C .
• Question 869: Which of the following statements is correct about light and sound waves? Both Options:
  A) are longitudinal waves
  B) are transverse waves
  C) have the same velocity in air
  D) need a medium for propagation
  E) transmit energy
  Show Answer
  The correct answer is E .
• Question 870: Which type of radiation does not NOT originate within the nucleus? Options:
  A) alpha
  B) beta
  C) gamma
  D) neutron
  E) x-rays
  Show Answer
  The correct answer is E .