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 631: Which of the following is a non-renewable energy source? Options:
  A) Coal
  B) Hydro
  C) Ocean waves
  D) Solar
  E) Tides
  Show Answer
  The correct answer is A .
• Question 632: An alternating source is connected in series to a capacitor of capacity reactance ${10}^3\sqrt{3}$ and a resistor of resistance 10³ Ohms. The Impedance of the circuit is... Options:
  A) $2000\sqrt{3}$ Ohms
  B) 2000 Ohms
  C) $1000\sqrt{3}$ Ohms
  D) 1000 Ohms
  Show Answer
  The correct answer is B .
• Question 633: The wavelength of ultraviolet radiation is 400nm. If the speed of light in air is 3 x 10⁸ms^-1, then the frequency of the ultraviolet radiation is Options:
  A) 1.3 x 10¹⁵Hz
  B) 7.5 x 10⁵Hz
  C) 1.2 x 10¹¹Hz
  D) 7.5 x 10¹⁴Hz
  Show Answer
  The correct answer is B .
• Question 634: The magnetic effect of a current-carrying coil is NOT utilized in the making of a/an Options:
  A) carbon microphone
  B) electric bells
  C) magnetic relay
  D) telephone earpiece
  E) thermostat
  Show Answer
  The correct answer is E .
• Question 635: In a sound wave in air, the adjacent rarefactions and compressions are separated by a distance of 17cm. If the velocity of the sound wave is 340ms^-1. Determine the frequency Options:
  A) 10Hz
  B) 20Hz
  C) 1000Hz
  D) 5780Hz
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  The correct answer is C .
• Question 636: A heating coil rated at 100W is used to boil off 0.5kg of boiling water. The time taken to boil off the water is [specific latent heat of vaporization of water = 2.3 x 10⁶Jkg^-1] Options:
  A) 1.15 x 10⁹ s
  B) 1.15 x 10⁷ s
  C) 1.15 x 10⁵ s
  D) 1.15 x 10⁴ s
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  The correct answer is D .
• Question 637: A brass rod is 2m long at a certain temperature. What is the length for a temperature rise of 100K, if the expansivity of brass is 18 x 10^-6K^-1? Options:
  A) 2.0036m
  B) 2.0018cm
  C) 2.1800
  D) 2.0360m
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  The correct answer is A .
• Question 638:
  

  Name the type of equilibrium for each position of the ball

  Options:
  A) A - unstable, B - neutral, C - stable
  B) A - stable, B - neutral, C - unstable
  C) A - stable, B - unstable, C - neutral
  D) A - unstable, B - stable, C - neutral
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  The correct answer is D .
• Question 639:

  

  In the J-tube above, Y and X are on the same horizontal level and 30cm³ of air is trapped above Y when the atmospheric pressure is 75cm Hg, calculate the volume of air trapped above Y when 15cm Hg is now poured into the limb above X

  Options:
  A) 15 cm³
  B) 25 cm³
  C) 35 cm³
  D) 45 cm³
  Show Answer
  The correct answer is B .
• Question 640: In a projection lantern of focal length f, the object distance u, is such that Options:
  A) u > 2f > f
  B) u < f < 2f
  C) u = f < 2f
  D) f < u < 2f
  Show Answer
  The correct answer is D .