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 1101:

  

  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 1102: An electric cell has an internal resistance of 2 ohms. A current of 0.5A is found to flow when a resistor of 5 ohms resistance is connected across it. What is the electromotive force of the cell? Options:
  A) 5 volts
  B) 3.5 volts
  C) 2.5 volts
  D) 1 volts
  E) 10 volts
  Show Answer
  The correct answer is B .
• Question 1103:

  I. A liquid boils when its saturated vapour pressure is equal to the external pressure

  II. Dissolved substances in pure water lead to increase in the boiling point.

  III. When the external pressure is increased, the boiling point increases.

  IV. Dissolved substances in pure water decrease the boiling point.Which combination of the above are peculiarities of the boiling point of a liquid?

  Options:
  A) I, II and III
  B) I, II, III and IV
  C) I, II and IV
  D) II, III and IV
  Show Answer
  The correct answer is A .
• Question 1104: An object of mass 20kg is released from a height of 10m above the ground level. The kinetic energy of the object just before it hits the ground is Options:
  A) 200J
  B) 4000J
  C) 2000J
  D) 500J
  Show Answer
  The correct answer is C .
• Question 1105: Which of the following factors has no effect on the e.m.f. of a primary cell? Options:
  A) temperature
  B) size of the cell
  C) nature of the plate
  D) nature of the electrolyte
  Show Answer
  The correct answer is B .
• Question 1106: At reasonance, the phase angle in an a.c. circuit is Options:
  A) 90°
  B) 60°
  C) 0°
  D) 180°
  Show Answer
  The correct answer is C .
• Question 1107: A house has ten 40W and five 100W bulbs. How much will it cost the owner of the house to keep them lit for 10 hours if the cost of a unit is 5N? Options:
  A) N90
  B) N50
  C) N45
  D) N5
  Show Answer
  The correct answer is C .
• Question 1108: The difference of potential between the terminals of cells is 2.2 volts. When a 4ohm resistor is connected across the terminals of this cells, the potential difference is 2 volts. What is the internal resistance of the cell? Options:
  A) 0.10 ohms
  B) 0.25ohms
  C) 0.40ohms
  D) 2.50ohms
  E) 4.00ohms
  Show Answer
  The correct answer is C .
• Question 1109: During summer, the balance wheel of a clock expands.what effect does this have on the accuracy of the clock? Options:
  A) the clock gians time
  B) the accuracy of the clock is not affected
  C) the clock losses time
  D) the clock stops working
  Show Answer
  The correct answer is C .
• Question 1110: A student is at a height 4m above the ground during a thunderstorm. Give that the potential difference between the thundercloud and the ground is 10⁷v, the electric field created by the storm is Options:
  A) 2.0 * 10⁶ NC ^-1
  B) 2. 5 * 10⁶ NC ^-1
  C) 1.0 * 10⁷ NC ^-1
  D) 4.0 * 10⁷ NC ^-1
  Show Answer
  The correct answer is B .