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 1741:

  Which of the following characteristics of a wave is used in the measurement of the depth of the Sea?

  Options:
  A) diffraction
  B) interference
  C) refraction
  D) reflection
  Show Answer
  The correct answer is D .
• Question 1742: 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 1743:

  

  In the diagram above, a rod 50 cm long of uniform cross-section is suspended horizontally on a fulcrum, F, by the action of two forces. What is the weight of the rod?

  Options:
  A) 40N
  B) 80N
  C) 120N
  D) 200N
  Show Answer
  The correct answer is B .
• Question 1744: Radio waves emitted from an antenna are picked up by a radar after reflection from an aircraft in 4 x 10^-3S. How far is the aircraft from the antenna? [c = 3 x 10⁸ms^-1 ] Options:
  A) 6.0 x 10²ms^-1
  B) 1.2 x 10³km
  C) 3.0 x 10³km
  D) 6.0 x 10 ⁵km
  Show Answer
  The correct answer is D .
• Question 1745: The wavelength of a wave traveling with a velocity of 420 ms^-1 is 42 m. what is its period? Options:
  A) 1.2 s
  B) 1.0 s
  C) 0.5 s
  D) 0.1 s
  Show Answer
  The correct answer is D .
• Question 1746: A quantity of sungas at -133 occupies 1/3m³ under pressure 1.4 x 10⁵ Nm^-2. if the gas occupies 31 m^-2 at 37^oC, its pressure will be Options:
  A) 1.26 x 10³Nm^-2
  B) 3.3 x10⁴Nm^-2
  C) 1.35 x 10⁴Nm^-2
  D) 2.2 x 10⁴Nm^-2
  E) 10⁵Nm^-2
  Show Answer
  The correct answer is B .
• Question 1747: An object of mass 100g projected vertically upwards from the ground level has a velocity of 20ms^-1 at a height of 10m. calculate its initial kinetic energy at the ground level.[g = 10ms^-2, neglect air resistance] Options:
  A) 10 J
  B) 20 J
  C) 30 J
  D) 50 J
  Show Answer
  The correct answer is C .
• Question 1748:

  The slope of the straight line displacement-time graph indicates?

  Options:
  A) distance traveled
  B) uniform velocity
  C) uniform acceleration
  D) uniform speed
  Show Answer
  The correct answer is B .
• Question 1749: A radioactive element has a half life of 4 days. The fraction that has decayed in 16 days is? Options:
  A) (15)/16
  B) (1)/16
  C) (3)/4
  D) (1)/4
  Show Answer
  The correct answer is A .
• Question 1750: A parallel plate capacitor has a common plate area of 5 x 10^-8m² and plate separation of 2 x 10³m, Assuming free space, What is the capacitance? [$\epsilon$_o = 9.0 X 10^-12C²N^-1m^-2] Options:
  A) 2.25 x 10^-17F
  B) 4.50 x 10^-17F
  C) 2.25 x 10^-16F
  D) 4.50 x 10^-16F
  Show Answer
  The correct answer is C .