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 601:

  

  In the AC circuit diagram above, the resonance frequency is

  Options:
  A) 5000π Hz
  B) 2500π Hz
  C) 5000/π Hz
  D) 2500/π Hz
  Show Answer
  The correct answer is D .
• Question 602: When a resistance R is across a cell, the voltage across the terminals of the cell is reduced to two-third of its normal value. The internal resistance of the cell is Options:
  A) $\frac{2}{1}$R
  B) $\frac{1}{2}$R
  C) $\frac{3}{2}$R
  D) 5R
  Show Answer
  The correct answer is B .
• Question 603:

  0.5kg of water at 10ºC is completely converted to ice at 0ºC by extracting (88000) of heat from it. If the specific heat capacity of water is 4200jkg${}^1$ Cº. Calculate the specific latent heat of fusion of ice.

  Options:
  A) 9.0kjkg${}^{-1}$
  B) 84.0kjkg${}^{-1}$
  C) 134.0kjkg${}^{-1}$
  D) 168.0kjkg${}^{-1}$
  Show Answer
  The correct answer is C .
• Question 604: A transformer which can produce 8V from a 240v a.c. supply, has an efficiency of 80%. If the current in the secondary coil is 15A, calculate the current in the primary coil. Options:
  A) 0.625A
  B) 1.600A
  C) 2.500A
  D) 6.250A
  Show Answer
  The correct answer is A .
• Question 605:

  A boat at anchor is rocked by waves whose crest are 100m apart and whose velocity is 25ms^-1. At what interval does the wave crest reach the boat?

  Options:
  A) 2500.00s
  B) 75.00s
  C) 4.00s
  D) 0.25s
  Show Answer
  The correct answer is C .
• Question 606: For a best result using temperature to achieve an accurate measurement, it is best to use Options:
  A) Mercury thermometer
  B) gas thermometer
  C) clinical thermometer
  D) alcohol thermometer
  Show Answer
  The correct answer is B .
• Question 607: Dispersion of light by a glass prism is due to the Options:
  A) different colours of the glass
  B) different speeds of the various colours in glass
  C) defects in the glass
  D) high density of glass
  Show Answer
  The correct answer is B .
• Question 608: A load of 20N on a wire of cross-sectional area 8 x 10^-7m², produces an extension of 10m². calculate Young's modulus for the material of the wire if its length is 3m Options:
  A) 7.0 x 10¹¹Nm^-2
  B) 7.5 x 10¹¹Nm^-2
  C) 8.5 x 10¹¹Nm^-2
  D) 9.0 x 10¹¹Nm^-2
  Show Answer
  The correct answer is B .
• Question 609: A metal block of mass 5kg lies on a rough horizontal platform. If a horizontal force of 8N applied to the block through its center of mass just slides the block on the platform, then the coefficient of limiting friction between the block and platform is Options:
  A) 0.16
  B) 0.63
  C) 0.80
  D) 1.60
  E) 2.00
  Show Answer
  The correct answer is A .
• Question 610: A machine requires 1000J of work to raise a load of 500N through a vertical distance of 1.5m. Calculate the efficiency of the Options:
  A) 80%
  B) 75%
  C) 50%
  D) 33%
  Show Answer
  The correct answer is B .