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 2231:

  

  From the diagram above, calculate the energy stored in the capacitor

  Options:
  A) 4.0 x 10${}^{-2}$J
  B) 4.0 x 10${}^{-4}$J
  C) 8.0 x 10${}^{-4}$J
  D) 8.0 x 10${}^{-2}$J
  Show Answer
  The correct answer is B .
• Question 2232: What is the approximate critical angle for total internal reflection for diamond if the refractive index of diamond is 2.42? Options:
  A) 21^o
  B) 22^o
  C) 23^o
  D) 24^o
  Show Answer
  The correct answer is D .
• Question 2233:

  A given mass of gas has a pressure of 80 Nm${}^{-2}$ at a temperature of 47 C. If the temperature is reduced to 27 C with volume remaining constant, the new pressure is?

  Options:
  A) 46.0 Nm${}^{-2}$
  B) 75.0 Nm${}^{-2}$
  C) 80.0 Nm${}^{-2}$
  D) 85.3 Nm${}^{-2}$
  Show Answer
  The correct answer is B .
• Question 2234: Total internal reflection occurs when light moves from Options:
  A) a dense medium to a less dense medium
  B) air to water
  C) water to glass
  D) a less dense to a dense medium
  Show Answer
  The correct answer is A .
• Question 2235:

  

  What is the resultant capacity of the circuit

  Options:
  A) 1.5µF
  B) 18.0µF
  C) 6.0µF
  D) 6.8µF
  E) 8.83µF
  Show Answer
  The correct answer is A .
• Question 2236:

  A supply of 400V is connected across capacitors of 3μf and 6μf in series. Calculate the charge.

  Options:
  A) 8 x 10${}^{-4}$C
  B) 4 x 10${}^{-2}$C
  C) 8 x 10${}^{-3}$C
  D) 4 x 10${}^{-8}$C
  Show Answer
  The correct answer is A .
• Question 2237:

  In an elastic collisionI. Energy is conserved

  II. Energy is decreased

  III. Energy is increased

  IV. Linear momentum conversed

  Options:
  A) I only
  B) II and IV only
  C) II only
  D) III only
  Show Answer
  The correct answer is B .
• Question 2238: The point beyond which a stretched spring does not return to its original length is called the Options:
  A) breaking point
  B) elastic limit
  C) spring constant
  D) elasticity point
  E) release point
  Show Answer
  The correct answer is B .
• Question 2239: Why is it impossible for the lines of force of an electric field to cross one another? Options:
  A) like charges repel each other
  B) a charged particle is deflected by an eletric field
  C) like charges are arranged on the same line of force
  D) a positively charged particle can travel in only one direction at any time
  E) none of these is correct
  Show Answer
  The correct answer is D .
• Question 2240: A gas at a volume of V₀ in a container at pressure P₀ 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) P₀/5
  B) 4P₀/5
  C) P₀
  D) 5P₀
  Show Answer
  The correct answer is D .