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 1291: The component of vector X along the direction of vector Y is zero when Options:
  A) X and Y are in opposite directions to each other
  B) X is at an angle of 45° to Y
  C) X is perpendicular to Y
  D) X and Y are parallel to each other
  Show Answer
  The correct answer is D .
• Question 1292: A planet has mass m₁ and is at a distance r, from the sun. A second planet has mass m₂ = 10m₁ and at a distance of r₂ = 2r₁ from the sun. Determine the ratio of the gravitational force experienced by the planets. Options:
  A) 1 : 5
  B) 2 : 5
  C) 3 : 5
  D) 4 : 5
  Show Answer
  The correct answer is B .
• Question 1293: An electric current of 3Aflowing through an electric heating elements of resistance 20 embedded in 1,000g of an oil raises the temperature of the oil by 10^oC in 10 seconds then the specific heat capacity of the oil is Options:
  A) 1.8Jg^-1oC
  B) 0.6Jg^-1oC
  C) 0.18Jg^-1oC
  D) 18Jg^-1oC
  E) 0.06Jg^-1oC
  Show Answer
  The correct answer is C .
• Question 1294: Which of the following is common to evaporation and boiling? They Options:
  A) take place at any temperature
  B) are surface phenomena
  C) involve change of state
  D) take place at a definite pressure
  Show Answer
  The correct answer is C .
• Question 1295: Which of the following are True for $\alpha$-decay. i. mass number, decrease by four. ii. Atomic number decreases by two. iii. mass number does not change. Options:
  A) i and ii only
  B) ii and iii only
  C) i and iii only
  D) i, ii, and iii only
  Show Answer
  The correct answer is A .
• Question 1296: Which of the following pairs of light rays shows the widest separation in the spectrum of white light? Options:
  A) Red and blue
  B) Orange and green
  C) Red and indigo
  D) Violet and green
  E) Yellow and red
  Show Answer
  The correct answer is C .
• Question 1297: Electric charges on the surface of a conductor would be most evenly distributed if the shape of the conductor is Options:
  A) conical
  B) cubical
  C) cylindrical
  D) parabolic
  E) spherical
  Show Answer
  The correct answer is C .
• Question 1298: A hydrometer is an instrument used in measuring Options:
  A) vapour pressure of a fluid
  B) density of liquid
  C) relative humidity of a liquid
  D) relative density of a liquid
  Show Answer
  The correct answer is D .
• Question 1299: A transistor function mainly as a Options:
  A) switch and amplifier
  B) rectifier and an amplifier
  C) charge storer and an amplifier
  D) charge storer and a switch
  Show Answer
  The correct answer is A .
• Question 1300:

  Water and Kerosine are drawn respectively into the two limbs of a Hare's apparatus. The destiny of water is 1.0gcm${}^{-3}$ and the density of kerosine is 0.80gcm${}^{-3}$. If the height of the water column is 20.0cm, calculate the height of the kerosine column.

  Options:
  A) 1.6cm
  B) 16.0cm
  C) 20.0cm
  D) 25.0cm
  Show Answer
  The correct answer is D .