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 2141: Determine the distance between the consecutive antinodes XX if the wavelength is 66cm Options:
  A) 15cm
  B) 30cm
  C) 60cm
  D) 120cm
  Show Answer
  The correct answer is B .
• Question 2142: Determine the focal length of a thin converging lens if the power is 5.0 dioptres Options:
  A) 0.1 m
  B) 0.2 m
  C) 2.0 m
  D) 2.5 m
  Show Answer
  The correct answer is B .
• Question 2143: A cell of internal resistance 0.01Ω can be measured accurately using the Options:
  A) Ohm meter
  B) metre bridge
  C) potentiometer
  D) electroscope
  Show Answer
  The correct answer is C .
• Question 2144: Which of the following statements is NOT true of $\gamma$-rays? Options:
  A) $\gamma$-rays belong to the electromagnetic spectrum
  B) $\gamma$-rays do not carry an electron charge
  C) $\gamma$-rays obey the inverse cube law in air
  D) the thickness of aluminium which stops b-particule has a negligible effect on $\gamma$-radiation
  E) the difference between $\gamma$-rays and X-rays is that $\gamma$-rays originate from energy charges in the nuclei of atoms, while X-rays comes from energy charges associated with the electron structure of atoms
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  The correct answer is C .
• Question 2145: What is the relative permitivity of a capacitor if its capacitance with a medium as dielectric is 16 farads and its capacitance with vacuum as dielectric is 2 farads? Options:
  A) o
  B) $\frac{1}{2}$
  C) 2
  D) 8
  E) 32
  Show Answer
  The correct answer is D .
• Question 2146:

  On a fairly cool rainy day when the temperature is 20^oC, the length of a steel railroad track is 20m. What will be its length on a hot a dry day when the temperature is 40^oC?

  [coefficient of linear expansion of steel = 11 x 10^-6K^-1]

  Options:
  A) 20.013m
  B) 20.009m
  C) 20.004m
  D) 20.002m
  Show Answer
  The correct answer is C .
• Question 2147: A vibrator of frequency 60Hz is used in generating transverse stationary waves in a long thin wire, If the average distance between successive nodes on the wire is 45cm, find the speed of the transverse waves in the wire. Options:
  A) 27ms^-1
  B) 54ms^-1
  C) 90ms^-1
  D) 108ms^-1
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  The correct answer is A .
• Question 2148:

  A quantity of ice at -10°C is heated until the temperature of the heating vessel is 90°C. Which of the following constants is NOT required to determine the quantity of heat supplied to the vessel?

  Options:
  A) Specific latent heat of vaporization
  B) Specific heat capacity of ice
  C) Specific latent heat of fusion
  D) Specific heat capacity of water
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  The correct answer is A .
• Question 2149:

  A transverse wave is applied to a string whose mass per unit length is 3 x 10^-2kgm^-1. If the string is under a tension 12N, the speed of the propagation of the wave is

  Options:
  A) 5 ms^-1
  B) 20 ms^-1
  C) 30 ms^-1
  D) 40 ms^-1
  Show Answer
  The correct answer is B .
• Question 2150:

  

  The figure above shows displacement-time graphs for three different motions. which of the following statements is correct

  Options:
  A) graph 2 corresponds to the highest velocity
  B) graph 1 corresponds to zero gravity
  C) graph 3 corresponds to a particle moving in the negative x direction
  D) graph 2 corresponds to a particle moving in the positive x direction
  Show Answer
  The correct answer is D .