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 91:

  Heat is supplied uniformly at the rate of 100W to 1.0 x 10${}^{-2}$kg of a liquid for 20 seconds. If the temperature of the liquid rises by 5${}^o$C, then the specific heat capacity of the liquid is

  Options:
  A) 2.0 x 10${}^2$Jkg${}^{-}1$K${}^{-}1$
  B) 2.0 x 10${}^2$Jkg${}^{-}1$
  C) 4.0 x 10${}^4$Jkg${}^{-}1$K${}^{-}1$
  D) 4.0 x 10${}^4$Jkg${}^{-}1$
  Show Answer
  The correct answer is C .
• Question 92:

  The working of the beam balance is based on the principle of

  Options:
  A) moments
  B) conservation of energy
  C) equivalence
  D) floatation
  Show Answer
  The correct answer is A .
• Question 93:

  A gas at a volume of V${}_0$ in a container at pressure p${}_0$ is compressed to one-fifth of its volume. What will be its pressure if the magnitude of its original temperature T is constant?

  Options:
  A) $\frac{p_0}{5}$
  B) $\frac{4p_0}{5}$
  C) p${}_0$
  D) 5P${}_0$
  Show Answer
  The correct answer is D .
• Question 94:

  A thermocouple thermometer is connected to a millivoltmeter which can read up to 10mV. When one junction is in ice at 0°C and the other is steam at 100°C, the millivoltmeter reads 4mV. What is the maximum temperature which this arrangement can measure

  Options:
  A) 100${}^o$C
  B) 248${}^o$C
  C) 250${}^o$C
  D) 350${}^o$C
  Show Answer
  The correct answer is C .
• Question 95: Which of the following is NOT a vector quantity? Options:
  A) Force
  B) Altitude
  C) weight
  D) Displacement
  E) Acceleration
  Show Answer
  The correct answer is B .
• Question 96: A galvanometer has a resistance of 5Ω. By using a shunt wire of resistance 0.05Ω, the galvanometer could be converted to an ammeter capable of reading 2Amp. What is the current through the galvanometer? Options:
  A) 2mA
  B) 10mA
  C) 20mA
  D) 25mA
  Show Answer
  The correct answer is C .
• Question 97: 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 .
• Question 98: An object is placed 10m from a pinhole camera of length 25cm. Calculate the linear magnification. Options:
  A) 2.5x10²
  B) 2.5x10^-2
  C) 2.5x10^-1
  D) 2.5x10¹
  Show Answer
  The correct answer is B .
• Question 99:

  

  When the sun, moon and the earth are as shown in the diagram above an observer standing in X is in

  Options:
  A) Penumbra and sees a partial eclipse
  B) Penumbra and sees a total eclipse
  C) umbra and sees a partial eclipse
  D) umbra and sees a total eclipse
  Show Answer
  The correct answer is A .
• Question 100:

  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 .