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 1711: When a number of identical small magnets are arranged in a line, the strength of the resultant magnet Options:
  A) ia largest when they are arranged end to end
  B) is greatest when they are arrangedparallel with like poles adjacent to each other
  C) depends only on the number of magnets provided they arev parallel
  D) is greater when the magnets are arranged on a wooden surface than on a metaln surface
  Show Answer
  The correct answer is A .
• Question 1712: Determine the inductive reactance when a 30.0mH inductor with a negligible resistance is connected to a 1.3 x 10³Hz oscillator. Options:
  A) 39.0$\mathrm{\Omega }$
  B) 122.5$\mathrm{\Omega }$
  C) 245.0$\mathrm{\Omega }$
  D) 39000.0$\mathrm{\Omega }$
  Show Answer
  The correct answer is C .
• Question 1713:

  

  The net capacitance of the circuit shown above is

  Options:
  A) 8.0µF
  B) 6.0µF
  C) 4.0µF
  D) 2.0µF
  Show Answer
  The correct answer is D .
• Question 1714:

  A man walks 1km due east and then 1 km due north. His displacement is

  Options:
  A) √2km N 45°E
  B) 1km N 30°E
  C) 1km N 15°E
  D) √2km N 60°E
  Show Answer
  The correct answer is A .
• Question 1715: A galvanometer of resistance 20$\mathrm{\Omega }$ is to be provided with a shunt that $\frac{1}{10}$ of the whole current in a circuit passes through the galvanometer. The resistance of the shunt is Options:
  A) 2.00$\mathrm{\Omega }$
  B) 2.22$\mathrm{\Omega }$
  C) 18.00$\mathrm{\Omega }$
  D) 18.22$\mathrm{\Omega }$
  Show Answer
  The correct answer is B .
• Question 1716: Which of the following best describes the energy changes which take place when a steam engine drives a generator which lights a lamp? Options:
  A) heat $\to$ light $\to$ sound $\to$ kinetic
  B) kinetic $\to$ light $\to$ heat $\to$ electricity
  C) heat $\to$ kinetic$\to$ electricity $\to$ heat $\to$ light
  D) electricity $\to$ kinetic $\to$ heat v light
  E) heat $\to$ sound $\to$ kninetic v electricity
  Show Answer
  The correct answer is C .
• Question 1717:

  

  Calculate the e.m.f of the cell in the above circuit if its internal resistance is negligible.

  Options:
  A) 12 V
  B) 8 V
  C) 2 V
  D) 36 V
  Show Answer
  The correct answer is B .
• Question 1718:

  I. Work done by load is always less than the work done by effort.

  II. All machines are made of levers, pulleys, screws and gear wheels.

  III. A fishing rod is a machine.

  Iv. Effort is always larger than load.

  which of statements above about machines are true?

  Options:
  A) I and III
  B) III and IV
  C) I and III
  D) II and III
  Show Answer
  The correct answer is C .
• Question 1719: When the r.m.s value of a source of electricity supply is given as 240v, it means that the peak value of the supply is Options:
  A) 240v
  B) 340v
  C) 480v
  D) 57600v
  Show Answer
  The correct answer is B .
• Question 1720: At what respective value of a, b, and c would the unit of work, the joule, be dimensionally similar to M^a L^b T^c? Options:
  A) 1, – 2, 1
  B) 1, 2, – 2
  C) 1, 1, –2
  D) 2, 2, 1
  Show Answer
  The correct answer is B .