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 231: A real object is placed at a distance ucm in front of a curved mirror of focal length fcm. If the image is upright and magnified, then the mirror is Options:
  A) convex and u =2f
  B) concave and u = 2f
  C) convex and u = f
  D) concave and u = f
  Show Answer
  The correct answer is A .
• Question 232: In a semi conductor junction diode, as the depletion or barrier layer is forward-biased, the layer Options:
  A) widens
  B) narrows
  C) remains constant
  D) widens then narrows
  Show Answer
  The correct answer is C .
• Question 233: Which of the following types of motion is/are exhibited by a cylindrical drum rolling down an incline plane? Options:
  A) Random and rotational
  B) Rotational and oscillatory
  C) Rotational only
  D) Translations only
  E) Translational and rotational
  Show Answer
  The correct answer is E .
• Question 234: What happens when three coplanar non-parallel forces are in equilibrium? Options:
  A) Their lines of action are parallel.
  B) They are represented in magnitude only
  C) They are represented in direction only
  D) Their lines of action meet at a point
  Show Answer
  The correct answer is D .
• Question 235: Calculate the work done in charging a capacitor of capacitance 20µF through a potential difference of 1000V. Options:
  A) 0.02 J
  B) 0.10 J
  C) 0.20 J
  D) 1.00 J
  E) 10.00 J
  Show Answer
  The correct answer is E .
• Question 236: The blade of a hoe feel colder to touch in the morning than the wooden handle because the Options:
  A) handle is a better conductor of heat than blade
  B) handle contains stored energy in form of heat
  C) blade is a better conductor of heat than the handle
  D) blade is placed at a lower temperature than the heat
  Show Answer
  The correct answer is C .
• Question 237: Myopic defects in the human eye can be corrected through the use of a Options:
  A) Concave Mirror
  B) Concave lens
  C) Prism
  D) Convex lens
  Show Answer
  The correct answer is B .
• Question 238:

  A given mass of gas has a pressure of 80 Nm${}^{-2}$ at a temperature of 47 C. If the temperature is reduced to 27 C with volume remaining constant, the new pressure is?

  Options:
  A) 46.0 Nm${}^{-2}$
  B) 75.0 Nm${}^{-2}$
  C) 80.0 Nm${}^{-2}$
  D) 85.3 Nm${}^{-2}$
  Show Answer
  The correct answer is B .
• Question 239:

  The half life of a radioactive material is 12 days. Calculate the decay constant.

  Options:
  A) 0.8663 $da{y}^{-1}$
  B) 0.04331 $da{y}^{-1}$
  C) 0.17325 $da{y}^{-1}$
  D) 0.05775 $da{y}^{-1}$
  Show Answer
  The correct answer is D .
• Question 240: A quantity of gas occupies a certain volume when the temperature is -73^oC and the pressure is 1.5 atmospheres. If the pressure is increased to 4.5 atmospheres and the volume is halved at the same time, what will be the new temperature of the gas? Options:
  A) 573^oC
  B) 327^oC
  C) 300^oC
  D) 110^oC
  E) 27^oC
  Show Answer
  The correct answer is E .