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 581:

  A binary operation $\otimes$ defined on the set of integers is such that m $\otimes$ n = m + n + mn for all integers m and n. Find the inverse of -5 under this operation, if the identity element is 0

  Options:
  A) $\frac{-5}{4}$
  B) $\frac{-5}{6}$
  C) o
  D) 5
  Show Answer
  The correct answer is A .
• Question 582: A good calorimeter should be of Options:
  A) low specific heat capacity and low heat conductivity
  B) low specific heat capacity and high heat conductivity
  C) high specific heat capacity and low heat conductivity
  D) high specific heat capacity and low heat conductivity
  E) dull surface and low heat conductivity
  Show Answer
  The correct answer is B .
• Question 583:

  In a series R-L-C circuit at resonance, the voltages across the resistor and the inductors are 30V and 40V respectively. What is the voltage across the capacitor?

  Options:
  A) 30V
  B) 40V
  C) 50V
  D) 70V
  Show Answer
  The correct answer is B .
• Question 584:

  The velocities of light in air and glass are 3.0 x 10${}^8$ms${}^{-1}$ and 2.0 x 10${}^8$ms${}^{-1}$ respectively. If the angle of refraction is 30º, the sine of the angle of incidence is?

  Options:
  A) 0.33
  B) 0.50
  C) 0.67
  D) 0.75
  Show Answer
  The correct answer is D .
• Question 585: The displacement d produced in a glass block of thickness t and refractive index n when an object is viewed through it is Options:
  A) t – n
  B) t (1 + 1/n)
  C) t (1-1/n)
  D) t (1/n - 1)
  Show Answer
  The correct answer is C .
• Question 586:

  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 587: Two similar kettles containing equal masses of boiling water are placed on a table. If the surface of one is highly polished and the surface of the other is covered with soot, Which of the following observations is correct Options:
  A) The two kettles will cool down at the same rate
  B) the polished kettle cools down more quickly by conduction
  C) the kettle covered with soot cools down more quickly because it is a good radiator
  D) the kettle covered with soot cools down more quickly by the process of heat convection
  Show Answer
  The correct answer is C .
• Question 588: A man wears convex lens glasses of focal length 40cm in order to correct his eye defect. instead of the optimum 25cm, his least distance of distinct vision is Options:
  A) 14cm
  B) 28cm
  C) 75cm
  D) 150cm
  Show Answer
  The correct answer is D .
• Question 589:

  A man on a bench will exert the greatest pressure on the bench when he

  Options:
  A) lies flat on his back
  B) lies flat on his belly
  C) stands on both feet
  D) stands on the toes of one foot
  Show Answer
  The correct answer is D .
• Question 590: The blade of a hoe feel colder to touch in the morning than the wooden handle because the Options:
  A) handle is a better conductor of heat than blade
  B) handle contains stored energy in form of heat
  C) blade is a better conductor of heat than the handle
  D) blade is placed at a lower temperature than the heat
  Show Answer
  The correct answer is C .