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 261: A body whose mass is 2kg and has a volume of 500cm just floats when completely immersed in a liquid. Calculate the density of the liquid Options:
  A) 4.0 x 10²kgm^-3
  B) 4.0 x 10³kgm^-3
  C) 1.0 x 10³kgm^-3
  D) 1.0 x 10⁶kgm^-3
  Show Answer
  The correct answer is B .
• Question 262: What is the velocity of sound at 100 ^oC if the velocity of sound at 0 ^oC is 340ms ^-1? Options:
  A) 497m^-1
  B) 440m^-1
  C) 397m^-1
  D) 240m^-1
  Show Answer
  The correct answer is B .
• Question 263: A body of mass 5kg initially at rest is acted upon by two mutually perpendicular forces 12N and 5N as shown in fig.3. If the particle moves in the direction QA, calculate the magnitude of the acceleration Options:
  A) 0.40ms^-2
  B) 1.40ms^-2
  C) 0.26ms^-2
  D) 2.60ms^-2
  E) 3.40ms^-2
  Show Answer
  The correct answer is D .
• Question 264: In order to find the depth of the sea, a ship sends out a sound wave and receives an echo after one second. If the velocity of sound in water is 1500ms^-1, what is the depth of the sea? Options:
  A) 0.75km
  B) 1.50km
  C) 2.20km
  D) 3.00km
  E) 3.75km
  Show Answer
  The correct answer is A .
• Question 265: The surfaces of conveyor belts are made rough so as to Options:
  A) protect them while carrying loads
  B) prevent the loads from slipping
  C) enable them to carry more load
  D) make them stronger
  Show Answer
  The correct answer is B .
• Question 266: A cube of side 10cm and mass 0.5kg floats in a liquid with only $\frac{1}{5}$ of its height above the liquid surface. What is the relative density of the liquid? Options:
  A) 0.125cm^-1
  B) 0.250gcm^-1
  C) 0.625cm^-1
  D) 2.500cm^-1
  Show Answer
  The correct answer is C .
• Question 267: Which of the following properties make the convex mirror useful as a driving mirror? i. the image is real. ii. the image is erect. iii. it has a wide field of view. iv. the image is magnified. Options:
  A) i, ii, and iv
  B) i, ii, iii
  C) ii and iii
  D) i and iii
  Show Answer
  The correct answer is C .
• Question 268: 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 269:

  A positively charged particle is placed near a negatively charged particle. What is the direction of the electric force between the two particles?

  Options:
  A) The electric force is directed from the negative particle to the positive particle.
  B) The electric force is zero.
  C) The direction of the electric force cannot be determined.
  D) The electric force is directed from the positive particle to the negative particle.
  Show Answer
  The correct answer is D .
• Question 270: A solid weighs 4.8g in air, 2.8g in water and 3.2g in kerosine. The ratio of density of the solid to that of the kerosine is Options:
  A) 12
  B) 3
  C) 2
  D) $\frac{3}{2}$
  E) $\frac{5}{4}$
  Show Answer
  The correct answer is B .