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 431:

  

  In the network shown above, determine the potential difference across the 5µF capacitor

  Options:
  A) 3V
  B) 6V
  C) 12V
  D) 18V
  Show Answer
  The correct answer is D .
• Question 432:

  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 433:

  

  The diagram above shows the velocity-time graph of a vehicle. Its acceleration and retardation respectively are

  Options:
  A) 8.0 ms^-2, 4,0 ms^-2
  B) 4.0 ms^-2, 8.0 ms^-2
  C) 4.0 ms^-2, 2.0 ms^-2
  D) 2.0 ms^-2, 4.0 ms^-2
  Show Answer
  The correct answer is C .
• Question 434: A wave disturbance travelling in air enters a medium in which its velocity is less than that in air. Which of the following statements is true about the wave medium? Options:
  A) both the frequency of the wave and the wavelength are decreased
  B) the frequency of the wave is decreased while the wavelength is increased
  C) the frequency of the wave is unaltered while the wavelength is decreased
  D) the frequency of the wave is decreased while the wavelength is unaltered
  Show Answer
  The correct answer is C .
• Question 435:

  Which of the following statements about radioactivity is true?

  (i) Alpha particle is positively charged

  (ii)Beta particle is negativelycharged

  (iii) Gamma ray is neutral

  (iv) Beta particle has thesame massas helium atom

  (v) Gamma ray is charged.

  Options:
  A) i, ii, iii, iv only
  B) i, ii, iii only
  C) iv and v only
  D) i, ii and v only
  Show Answer
  The correct answer is B .
• Question 436:

  The pitch of a screw jack is 0.45cm and the arm is 60cm long. If the efficiency of the Jack is 75/π %, calculate the mechanical advantage.

  Options:
  A) 400
  B) 300
  C) 200
  D) 150
  Show Answer
  The correct answer is C .
• Question 437: If the refractive index of a medium in air is 2.0, what is the critical angle for this medium? Options:
  A) 30^o
  B) 42^o
  C) 45^o
  D) 50^o
  Show Answer
  The correct answer is A .
• Question 438: What type of electromagnetic radiation can be used to take photographs in the haze? Options:
  A) Radio waves
  B) infrared rays
  C) Visible light
  D) Gamma rays
  Show Answer
  The correct answer is B .
• Question 439: An object placed 10cm from a concave mirror of focal length 5cm would have its image Options:
  A) at the centre of convature
  B) at the radius of curvature
  C) at infinity
  D) 10 cm from the focus
  Show Answer
  The correct answer is A .
• Question 440: A convex mirror is used as a driving mirror because i. its image is erect. ii. it has a large field of view. iii. it has a long focal length. Identify the CORRECT statement(s) Options:
  A) i andiii only
  B) i and ii only
  C) ii and iii only
  D) i, ii, and iii only
  E) i only
  Show Answer
  The correct answer is B .