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 221: Which of the following is required to convert a milliammeter to an ammeter? Options:
  A) A high resistance in parallel
  B) A high resistance in series
  C) A low resistance in parallel
  D) A low resistance in series
  Show Answer
  The correct answer is C .
• Question 222:

  

  A uniform light beam XZ is Hinged at X and kept in equilibrium by the forces T and F as shown in the diagram above. if XO = 20m and OY = 30cm, express T in terms of F

  Options:
  A) T =2√3/3
  B) T= 2F
  C) T = 5V3F/3
  D) T = 5F
  Show Answer
  The correct answer is D .
• Question 223: Which of the following phenomena explains the formation of a mirage? i. Reflection ii. Refraction iii. Diffraction Options:
  A) i and ii only
  B) ii and iii only
  C) i and iii only
  D) i, ii, and iii only
  Show Answer
  The correct answer is A .
• Question 224: One special advantage of alcohol over mercury as a thermometric liquid is its Options:
  A) low density
  B) low freezing point
  C) high specific
  D) low boiling point
  Show Answer
  The correct answer is B .
• Question 225: A vapour is said to be saturated when Options:
  A) more molecules return to the liquid than the amount that left it
  B) a dynamic equilibrium exists between the molecules of the liquid and the vapour molecules at a given temperature
  C) the vapour pressure is equal to the atmospheric pressure
  D) all molecules are moving with the same speed in all directions at a given temperature
  Show Answer
  The correct answer is B .
• Question 226: A bar of initial length /₀ is heated through a temperature change $\mathrm{\Delta }$t to a new length I. The linear expansivity, a, of the bar is Options:
  A) $\frac{/-{/}_o}{/\mathrm{\Delta }t}$
  B) $\frac{/-{/}_o}{{/}_o\mathrm{\Delta }t}$
  C) /_o(1 + $\mathrm{\Delta }$ t)
  D) $\frac{/-{/}_o}{/(1+\mathrm{\Delta }t)}$
  Show Answer
  The correct answer is B .
• Question 227: The inside portion of part of a hollow metal sphere of diameter 20cm is polished. The portion will therefore form a Options:
  A) concave mirror of focal length 5cm
  B) concave mirror of focal length 10cm
  C) convex mirror of focal length 5cm
  D) convex mirror of focal length 20cm
  Show Answer
  The correct answer is A .
• Question 228:

  I. Wavelength

  II. Medium of propagation

  III. Wave velocity

  IV. Frequency

  V. Energy

  Which of the above are used for characterizing waves?

  Options:
  A) I, II and V
  B) I and IV
  C) I, III and IV
  D) III, IV and V
  Show Answer
  The correct answer is C .
• Question 229: Capacitors are used in the induction coil to Options:
  A) control circuits
  B) prevent distortion of electric fields
  C) prevent electric sparks
  D) dissipate energy
  Show Answer
  The correct answer is C .
• Question 230: Which of the following statements is TRUE of photoelectric effect? Options:
  A) it cannot occur in liquids
  B) the energy of the emitted electrons is independent of the work function of the surface
  C) the energy of the emitted electron depends on the wavelength of the incident light
  D) the greater the intensity of the incuident light, the greater the incident of the emitted electron
  Show Answer
  The correct answer is A .