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 251: A simple pendulum, 0.6m long, has a period of 1.5s. What is the period of a similar pendulum of 0.4m length in the same location? Options:
  A) $1.5\frac{\sqrt{2}}{3}$s
  B) $1.5\frac{\sqrt{3}}{2}$s
  C) 2.25s
  D) 1.00s
  E) 2.00s
  Show Answer
  The correct answer is A .
• Question 252: An ice cube floats in a glass of water filled to the brim. What happens when the ice melts? Options:
  A) The water level remains the same
  B) there is a drop in the level of water in the glass due to condensation on its outside
  C) the water in the glass overflows
  D) the level of water drops because melted ice occupies less volume
  E) none of the above is correct
  Show Answer
  The correct answer is A .
• Question 253: Primary colours of light are Options:
  A) Red, blue and green
  B) Cyan, magneta and yellow
  C) Black, blue and green
  D) None of these colours
  Show Answer
  The correct answer is A .
• Question 254:

  

  Three 2-µF capacitors are arranged as seen in the circuit above . The effective capacitance between E and F is

  Options:
  A) 0.75µF
  B) 1.33µF
  C) 3.00µF
  D) 6.00µF
  Show Answer
  The correct answer is B .
• Question 255: A 12V battery supplies a current of 0.4A to a lamp. Calculate the resistance of the lamp. Options:
  A) 30.00
  B) 4.80
  C) 3.00
  D) 0.30
  E) 0.03
  Show Answer
  The correct answer is A .
• Question 256: Which of the following pairs of musical instruments produce sound due to the vibration of air column? Options:
  A) Bell and piano
  B) Guitar and flute
  C) Trumpet and drum
  D) Trumpet and flute
  E) Violin and organ
  Show Answer
  The correct answer is D .
• Question 257:

  If the fraction of the atoms of a radioactive material left after 120 years is 1/64, what is the half-life of the material?

  Options:
  A) 24 years
  B) 20 years
  C) 10 years
  D) 2 years
  Show Answer
  The correct answer is B .
• Question 258: If the threshold frequency for tungsten is 1.3 x 10¹⁵Hz, what is its work function?
  [H = 6.6 x 10^-34 Js] Options:
  A) 8.58 x 10^-19 J
  B) 8.50 x 10^-15 J
  C) 8.58 x 10^-17 J
  D) 8.85 x 10^-18
  Show Answer
  The correct answer is A .
• Question 259: When vibration occurs in air column, the distance between a node and an antinode is equal to Options:
  A) one-quarter of the wavelength
  B) one-hall of the wavelength
  C) the wave length
  D) twice the wavelength
  E) four-times the wavelength
  Show Answer
  The correct answer is A .
• Question 260: 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 .