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 1281:

  

  The frequency of the wave in the diagram above is

  Options:
  A) 0.17 Hz
  B) 0.25 Hz
  C) 1.57 Hz
  D) 1.05 Hz
  Show Answer
  The correct answer is B .
• Question 1282: A simple pendulum has a period of 17.0s. When the length is shorten by 1.5m, its period is 8.5s. Calculate the original length of the pendulum Options:
  A) 4.0 m
  B) 3.0 m
  C) 2.0 m
  D) 1.5 m
  Show Answer
  The correct answer is C .
• Question 1283:
  

  A 200 kg load is raised using a 110 m long lever as shown in the diagram above. The load is 10m from the pivot P. If the efficiency of the the lever is 80%, find the effort E required to lift the load.

  [Take g = 10ms-2]

  Options:
  A) 250
  B) 300
  C) 450
  D) 200
  Show Answer
  The correct answer is A .
• Question 1284: Which of the following statements correctly describe(s) cathode rays? i. they consist of tiny particles carrying negative electric charges. ii. they are deflected in a magnetic field but not in an electric field. iii. they consist of fast moving neutrons and deflected in an electric field. Options:
  A) i only
  B) ii only
  C) i and ii only
  D) ii and iii only
  Show Answer
  The correct answer is A .
• Question 1285: The energy associated with the emitted photon when a mercury atom changes from one state to another is 3.3 ev. calculate the frequency of the photon.
  [e = 1.6 x 10^-19c; h = 6.6 x 10^-13js] Options:
  A) 1.3 x 10^-15 Hz
  B) 3.1 x 10⁵² Hz
  C) 3.2 x 10^-53 Hz
  D) 8.0 x 10¹⁴ Hz
  Show Answer
  The correct answer is D .
• Question 1286:

  

  Two mirrors of the same length are arranged as shown above, a ray of light NO strikes the system at O and emerges along PQ. The emergent ray has been deviated through

  Options:
  A) 220 degrees
  B) 200 degrees
  C) 210 degrees
  D) 180 degrees
  E) 230 degrees
  Show Answer
  The correct answer is D .
• Question 1287: A piece of wood floats inside water at room temperature with a fraction of it above the liquid surface. As the temperature of the water is raised, the part of the wood above the liquid will Options:
  A) decrease because the density of water decreases with temperature
  B) increase because the density of water decreases with temperature
  C) decreases because the density of water increases with water temperature
  D) increase because the density of water increases with temperature
  Show Answer
  The correct answer is A .
• Question 1288: In which of the following are the substance arranged in descending order of their thermal conductivities? Options:
  A) copper, steel, glass
  B) steel, copper, glass
  C) steel, glass, copper
  D) copper, glass, steel
  Show Answer
  The correct answer is A .
• Question 1289: In which of the following arrangements is the wavelength in an increasing order? Options:
  A) Gamma rays, infra-red rays, x-rays, radiowaves
  B) Gamma rays, x-rays, infra-red ray, radiowaves
  C) Radiowaves, x-rays, gamma ray, infra-red rays
  D) Infra-red rays, radiowaves, x-rays, gamma rays
  Show Answer
  The correct answer is B .
• Question 1290: Which of the following properties make the convex mirror useful as a driving mirror? i. the image is real. ii. the image is erect. iii. it has a wide field of view. iv. the image is magnified. Options:
  A) i, ii, and iv
  B) i, ii, iii
  C) ii and iii
  D) i and iii
  Show Answer
  The correct answer is C .