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 51: A ship travelling towards a cliff receives the echo of its whistle after 3.5 seconds. A short while later, it receives the echo after 2.5 seconds. If the speed of sound in air under the prevalling condition is 250ms ^-1, how much closer is the ship to the cliff? Options:
  A) 10m
  B) 125m
  C) 175m
  D) 350m
  E) 1,000m
  Show Answer
  The correct answer is B .
• Question 52: At what depth below the sea-level would one experience a change of pressure equal to one atmosphere? Density of sea water = 1013kg^-3, one atmosphere = 0.01 x 10⁵Nm^-2, g = 10ms^-2 Options:
  A) 0.1m
  B) 1.0m
  C) 10.0m
  D) 100.0m
  Show Answer
  The correct answer is C .
• Question 53: If a plastic sphere floats in water (density = 1000kgm³) with 0.5 of its volume submerged, and floats in oil with 0.4 of its volume submerged the density of the oil is Options:
  A) 800kgm³
  B) 1200kgm³
  C) 1250kgm³
  D) 2000kgm³
  Show Answer
  The correct answer is A .
• Question 54: Which of the following has no effect on radiation? Options:
  A) nature of surface
  B) density
  C) surface area
  D) temperature
  Show Answer
  The correct answer is B .
• Question 55: 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 56:

  A ball of mass 0.1kg is thrown vertically upwards with a speed of 10ms${}^{-1}$ from the top of a tower 10m high. Neglecting air resistance, its total energyjust before hitting the ground is? (Take g = 10ms${}^{-2}$)

  Options:
  A) 5J
  B) 10J
  C) 15J
  D) 20J
  Show Answer
  The correct answer is C .
• Question 57:

  

  Given that SQ = 10cm and SP = 6cm, the refractive index of a block of glass shown above is

  Options:
  A) 0.30
  B) 0.60
  C) 1.67
  D) 2.33
  E) 2.36
  Show Answer
  The correct answer is C .
• Question 58: If a beaker is filled with water it is observed that the surface of the water is not horizontal at the glass-water interface. This behavior is due to Options:
  A) friction
  B) viscosity
  C) surface tension
  D) evaporation
  Show Answer
  The correct answer is C .
• Question 59: The electrolyte in the Nickei-iron (Nife) accumulator is Options:
  A) potassium hydroxide solution
  B) dilute tetraoxosulphate(VI)acid
  C) copper tetraoxosulphate(VI)solution
  D) ammonium chloride solution
  Show Answer
  The correct answer is A .
• Question 60: A bead traveling on a straight wire is brought to rest at 0.2m 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 done by the friction Options:
  A) $2\times {10}^{-4}J$
  B) $2\times {10}^{-3}J$
  C) $2\times {10}^{1}J$
  D) $2\times {10}^{2}J$
  Show Answer
  The correct answer is B .