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 481: Two 50$\mu$F parallel plate capacitors are connected in series. The combined capacitor is then connected across a 100-V battery. The charge on each plate of the capacitor is Options:
  A) 5.00 x 10^-5C
  B) 2.50 x 10^-3C
  C) 1.25 x 10^-3C
  D) 1.00 x 10^-2C
  Show Answer
  The correct answer is B .
• Question 482:

  I. It retains its magnetic much longer than steel.
  II. It is more easily magnetized than steel.
  III. It is more easily demagnetized than steel.
  IV. It produces a stronger magnet than steel.

  Which combination of the above makes iron preferable to steel in the making of electromagnets?

  Options:
  A) I and II only
  B) II and III only
  C) I, III, and IV only
  D) II, III and IV only
  Show Answer
  The correct answer is B .
• Question 483: A body that produces its own light is said to be Options:
  A) luminous
  B) non-incandescent
  C) opaque
  D) translucent
  E) transparent
  Show Answer
  The correct answer is A .
• Question 484: Two lamps are rated 40W and 220V each are connected in series. The total power dissipated in both lamps is Options:
  A) 10W
  B) 20W
  C) 40W
  D) 80W
  E) None of the above
  Show Answer
  The correct answer is D .
• Question 485: If the fraction of the atoms of a radioactive material left after 120years 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 486:

  

  The diagram above shows two wave forms P and Q at a particular instant in time. the two waves will interface

  Options:
  A) destructively to produce a wave of larger amplitude
  B) destructively to produce a wave of smaller amplitude
  C) constructively to produce a wave of larger amplitude
  D) constructively to produce a wave of smaller amplitude
  Show Answer
  The correct answer is C .
• Question 487: Which of the following phenomena explains the fact that a house whose roof is coated with white paint will be cooler in the hot season than one coated with black paint ? Options:
  A) conduction
  B) convection
  C) refraction
  D) reflection
  Show Answer
  The correct answer is D .
• Question 488:

  

  In the diagram above a beam of white light travels from a rare to a dense medium. What colours of light do the rays a, b and c respectively represents?

  Options:
  A) red, green and blue
  B) Green, red and blue
  C) Yellow , blue and red
  D) Blue , yellow and red
  Show Answer
  The correct answer is A .
• Question 489:

  According to kinetic molecular model, in gases

  Options:
  A) The molecules are very fast apart and occupy all the space made available.
  B) The particles occur in clusters with molecules slightly farther apart.
  C) The particles are closely packed together, they occupy minimum space and are usually arranged in a regular pattern.
  D) The particles vibrate about fixed positions and are held together by the strong inter-molecular bond between them.
  Show Answer
  The correct answer is A .
• Question 490: Which of the following is not an electromagnetic radiation? Options:
  A) x - ray
  B) Radio waves
  C) sunlight
  D) sound waves
  Show Answer
  The correct answer is D .