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 971: If relative density of a metal is 19, what will be the mass of 20cm³ of the metal when immersed in water? Options:
  A) 380g
  B) 400g
  C) 360g
  D) 39g
  E) 180g
  Show Answer
  The correct answer is A .
• Question 972: Two capacitors R₁ = 4$\mathrm{\Omega }$ and R₂ = 5$\mathrm{\Omega }$ are connected in parallel across a potential difference. If P₁ and P₂ represent power dissipated in R ₁ and R₂ respectively, then the ratio P₁ : P₂ is Options:
  A) 4 : 5
  B) 5 : 4
  C) 16 : 25
  D) 25 : 16
  Show Answer
  The correct answer is B .
• Question 973:

  The number of holes in an intrinsic semiconductor

  Options:
  A) is not equal to the number of free electrons
  B) is greater than the number of free electrons
  C) is equal to the number of free electrons
  D) is less than the number of free electrons
  Show Answer
  The correct answer is C .
• Question 974:

  If a body moves with a constant speed and at the same time undergoes an acceleration, its motion is said to be

  Options:
  A) oscillation
  B) circular
  C) rotational
  D) rectilinear
  Show Answer
  The correct answer is B .
• Question 975:

  

  The total resistance measured at PQ in the diagram above is

  Options:
  A) 18.0Ω
  B) 11.0Ω
  C) 4.0Ω
  D) 2.0Ω
  Show Answer
  The correct answer is C .
• Question 976: 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 977: Two capacitors R₁ = 4$\mathrm{\Omega }$ and R₂ = 5$\mathrm{\Omega }$ are connected in parallel across a potential difference. If P₁ and P₂ represent power dissipated in R ₁ and R₂ respectively, then the ratio P₁ : P₂ is Options:
  A) 4 : 5
  B) 5 : 4
  C) 16 : 25
  D) 25 : 16
  Show Answer
  The correct answer is B .
• Question 978: Which of the following is not luminous object? Options:
  A) The sun
  B) The moon
  C) light candle
  D) Star
  Show Answer
  The correct answer is B .
• Question 979:

  

  In the a.c circuit above, the current value is

  Options:
  A) 0.58 A
  B) 3.00 A
  C) 4.00 A
  D) 6.67 A
  Show Answer
  The correct answer is C .
• Question 980: A cell has an open circuit voltage V₁ and a closed circuit voltage V₂ when a current is flowing through it. Therefore, the internal resistance of the cell is Options:
  A) $\frac{V_2}{I}$
  B) $\frac{V_1}{I}$
  C) $\frac{(V_1+V_2)}{I}$
  D) $\frac{(V_1-V_2)}{I}$
  E) $\frac{(V_2-V_1)}{I}$
  Show Answer
  The correct answer is E .