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 331:

  A bead travelling on a straight line wire is brought to rest at 0.2 by friction. If the mass of the bead is 0.01kg and the coefficient of friction between the bead and the wire is 0.1, determine the work one by the friction. [g = 10ms²]

  Options:
  A) 2 $\times$ 10^-4
  B) 2 $\times$ 10^-3
  C) 2 $\times$ 10¹
  D) 2 $\times$ 10²
  Show Answer
  The correct answer is B .
• Question 332: The electrochemical equivalent of a metal is 1.3 x 10^-7kgC^-1. The mass of the metal which 2.0 x 10⁴C of electricity will deposit from a suitable electrolyte is Options:
  A) 6.5 x 10^-2kg
  B) 2.6 x 10^-2kg
  C) 6.5 x 10^-3kg
  D) 2.6 x 10^-3kg
  Show Answer
  The correct answer is D .
• Question 333: 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 334:
  

  Calculate the effective capacitance of the circuit in the diagram given

  Options:
  A) 4μf
  B) 3μf
  C) 2μf
  D) 1μf
  Show Answer
  The correct answer is D .
• Question 335: Which of the following devices are used to measure pressure? i. Aneroid barometer. ii. hydrometer. iii. hygrometer. iv. manometer. Options:
  A) i and iii
  B) ii and iii
  C) iii and iv
  D) i and iv
  Show Answer
  The correct answer is D .
• Question 336: A cell of internal resistance 2 ohms supplies current to a 6 ohms resistor. The efficiency of the cell is Options:
  A) 12.0%
  B) 25.0%
  C) 33.3%
  D) 75.0%
  Show Answer
  The correct answer is D .
• Question 337:

  

  The diagram above represents the field pattern obtained by bringing the poles of two magnets together.The poles must be

  Options:
  A) S-S poles
  B) S-N poles
  C) N-S poles
  D) N-N poles
  Show Answer
  The correct answer is A .
• Question 338: Which of the following pairs of musical instruments produce sound due to the vibration of air column? Options:
  A) Bell and piano
  B) Guitar and flute
  C) Trumpet and drum
  D) Trumpet and flute
  E) Violin and organ
  Show Answer
  The correct answer is D .
• Question 339: A household refrigerator is rated 200 watts. If electricity costs 5k per kWh, what is the cost of operating it in 20 days? Options:
  A) N4.80
  B) N48.00
  C) N480.00
  D) N4800.00
  Show Answer
  The correct answer is C .
• Question 340: Which of the following statements about the compound microscope and astronomical telescope is (are) correct? i. the final image of a compound microscope is located at infinity ii. the final image of the astronomical telescope is always erect iii. the objective lens of a compound microscope has a very short focal length Options:
  A) i only
  B) ii only
  C) iii only
  D) i and iii
  E) ii and iii
  Show Answer
  The correct answer is C .