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 1151:

  

  An electrical circuit is connected up as shown above, which of the following is correct about the value of current flowing through the 1 ohm resistance?

  Options:
  A) 12/13A
  B) 13/12A
  C) 1/3A
  D) 3A
  E) 12/7A
  Show Answer
  The correct answer is D .
• Question 1152:

  A piece of substance of specific heatcapacity 450Jkg${}^{-1}$k${}^1$ falls through a vertical distance of 20m from rest. Calculate the rise in temperature of the substance on hitting the ground when all its energies are converted into heat. [g = 10ms${}^{-2}$]

  Options:
  A) $\frac{2}{9}$ºC
  B) $\frac{4}{9}$ºC
  C) $\frac{9}{2}$ºC
  D) $\frac{9}{4}$ºC
  Show Answer
  The correct answer is B .
• Question 1153: The image in a pin-hole camera is Options:
  A) errect and formed by refraction through a lens
  B) virtual and formed by dispersion
  C) erect and gets sharper as the hole becomes larger
  D) inverted and formed by the light from each point travelling in a straight line
  Show Answer
  The correct answer is D .
• Question 1154: A given quantity of heat increases the temperature of 150grams of water from 9^oC to 15^oC and increases the temperature of oil of 100grams from 9^oC to 25^oC. The ratio of the specific heat of oil to that of water is Options:
  A) 0.36
  B) 0.46
  C) 0.56
  D) 0.76
  E) 0.86
  Show Answer
  The correct answer is C .
• Question 1155: A man whose mass is 80kg climbs a staircase in 20s and expends power of 120W. Find the height of the staircase.[g = 10ms^-2] Options:
  A) 1.8m
  B) 2.0m
  C) 2.5m
  D) 3.0m
  Show Answer
  The correct answer is D .
• Question 1156:

  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 1157: When an object is placed between the principal focus and the optical center of a convex lens, it could be used as a? Options:
  A) Simple microscope
  B) refecting lens
  C) compound microscope
  D) projector
  Show Answer
  The correct answer is A .
• Question 1158: The most suitable cell used for short interval switches in electric bells is a Options:
  A) lead- acid accumulator
  B) Daniel cell
  C) Leclanche cell
  D) nickel iron accumulator
  Show Answer
  The correct answer is C .
• Question 1159: The photocell works on the principle of the Options:
  A) voltaic cell
  B) emision of electrons by incident radiation
  C) emision of protons by incident electrons
  D) photographic plate
  Show Answer
  The correct answer is B .
• Question 1160: A man clapping his hands at regular intervals observes that the echo of a clap coincides with the next clap. If the reflecting cliff is 160m away and the speed of sound is 320ms^-1, what is the frequency of the clapping? Options:
  A) 1 Hz
  B) 2Hz
  C) 4Hz
  D) 8Hz
  Show Answer
  The correct answer is A .