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 1141:

  Calculate the mass of ice that would melt when 2kg of copper is quickly transferred from boiling water to a block of ice without heat loss (specific heat capacity of copper = 400Jkg${}^1$k${}^{-1}$, latent heat of fusion of ice = 3.3 x 10${}^5$Jkg${}^{-1}$)

  Options:
  A) $\frac{8}{33}$kg
  B) $\frac{3.3}{80}$kg
  C) $\frac{80}{33}$kg
  D) $\frac{3.3}{8}$kg
  Show Answer
  The correct answer is A .
• Question 1142: Calculate the escape velocity of a satellite launched from the earth's surface if the radius of the earth is 6.4x10⁶m Options:
  A) 25.3kms^-1
  B) 4.2kms^-1
  C) 4.0kms^-1
  D) 11.3kms^-1
  Show Answer
  The correct answer is D .
• Question 1143: The main reason for making the cover of a vacuum flask airtight is to prevent heat loss by Options:
  A) convection
  B) conduction
  C) radiation
  D) evaporation
  Show Answer
  The correct answer is A .
• Question 1144: As the pressure of a fluid increases, its viscosity Options:
  A) decreases
  B) increases
  C) increases then decreases
  D) remains constant
  Show Answer
  The correct answer is B .
• Question 1145:

  

  In fig 9 the value of R is

  Options:
  A) 3Ω
  B) 4Ω
  C) 5Ω
  D) 6Ω
  Show Answer
  The correct answer is D .
• Question 1146: The unit of quantity of electricity is called Options:
  A) the ampere
  B) the volts
  C) the coulomb
  D) the ammeter
  E) electromotive force
  Show Answer
  The correct answer is C .
• Question 1147: A generator is on daily use and in the process, ten 60 W and five 40 W tungsten bulbs are on for the same time interval. the energy consumed daily is? Options:
  A) 0.96 kWh
  B) 19.2 kWh
  C) 9.60 kWh
  D) 19.20 kWh
  Show Answer
  The correct answer is B .
• Question 1148: To produce a parallel beam of light from a concave mirror, the distance at a which the lamp should be placed from the mirror is equal to Options:
  A) the focal length
  B) two times the focal length
  C) the distance of the image
  D) two times the radius of curvature
  Show Answer
  The correct answer is A .
• Question 1149: Which process will increase the rate of oscillation of a pendulum? Options:
  A) decreasing the amplitude of oscillation of the pendulum
  B) decreasing the length of the pendulum
  C) decreasing the mass of the pendulum
  D) increasing the length of the pendulum
  E) increasing the mass of the pendulum.
  Show Answer
  The correct answer is B .
• Question 1150: The theory of electronic conduction in solids, which satisfactorily explains the properties of conductors, insulators and semi-conductor,is? Options:
  A) string theory
  B) particle theory
  C) group theory
  D) band theory
  Show Answer
  The correct answer is D .