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 831:

  Arrange the following in the order of their increasing frequency.I. Visible light

  II. Gamma rays

  III. Radio waves

  IV. Infra-red radiation

  V. Ultra-violet radiation

  Options:
  A) I, II, III, IV, V
  B) II, III, IV, V, I
  C) III, IV, V, I, II
  D) IV, III, I. V, II
  E) III, IV, I,V, II
  Show Answer
  The correct answer is E .
• Question 832:

  

  Calculate the refractive index of the material for the glass prism in the diagram above

  Options:
  A) ^√2/₂
  B) ⁴/₃
  C) √2
  D) ³/₂
  Show Answer
  The correct answer is C .
• Question 833: The resistance in a series R-C circuit is 5 Ω. If the impedance of the circuit is 13 Ω, calculate the reactance of the capacitor Options:
  A) 65 Ω
  B) 18 Ω
  C) 16 Ω
  D) 14 Ω
  E) 12 Ω
  Show Answer
  The correct answer is E .
• Question 834: A narrow, uniform glass tube, closed at one end, constains air which is sealed by a thread of mercury. The tube is placed first horizontally and then vertically with the open end at the top. Which of the following statements is correct? Options:
  A) The length of the entrapped air in the horizontal position is less than that in the vertical position
  B) The length of the entrapped air in the vertical position is less than that in the horizontal position
  C) The length of the mercury column becomes shorter in the horizontal position than in the vertical position
  D) The length of the mercury column becomes shorter in the vertical position than in the horizontal position
  E) The pressure of the entrapped air is atmospheric in both cases.
  Show Answer
  The correct answer is B .
• Question 835: A machine has a velocity ratio of 4. if it requires 800 N to overcome a load of 1600 N,what is the efficiency of the machine? Options:
  A) 60%
  B) 50%
  C) 40%
  D) 2%
  Show Answer
  The correct answer is B .
• Question 836: The use of electrical fuses in domestic wiring is Options:
  A) to prevent and electrical shock
  B) to supply electricity to all the electrical appliances
  C) to allow electricity to flow easily through the mains to all the circuits
  D) to cut off the mains supply it too high a current flows
  E) to fuse all the circuit into one
  Show Answer
  The correct answer is D .
• Question 837:

  A 3000W electric cooker is to be used on a 200V mains circuit. Which of the fuses below can be used safely with the cooker?

  Options:
  A) 2A
  B) 5A
  C) 10A
  D) 20A
  Show Answer
  The correct answer is D .
• Question 838: If the refractive index of water is 1.33, what is the critical angle for a water-air boundary? Options:
  A) 36.0 °
  B) 40.2 °
  C) 41.8 °
  D) 48.8 °
  E) 62.7 °
  Show Answer
  The correct answer is D .
• Question 839: A machine has a velocity ratio of 5. It requires a 50kg weight to overcome a 200kg weight. The efficiency is Options:
  A) 4%
  B) 5%
  C) 40%
  D) 50%
  E) 80%
  Show Answer
  The correct answer is E .
• Question 840:

  If the stress on a wire is 10${}^7$NM${}^{-2}$ and the wire is stretched from its original length of 10.00m to 10.05m. The young'smodulus of the wire is?

  Options:
  A) 5.0 x 10${}^{-4}$Nm${}^{-2}$
  B) 5.0 x 10${}^{-5}$Nm${}^{-2}$
  C) 2.0 x 10${}^{-8}$Nm${}^{-2}$
  D) 2.0 x 10${}^9$Nm${}^{-2}$
  Show Answer
  The correct answer is D .