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 691: A boy looks at the image of an object in a plane mirror. He observes two images, a main bright one and the other faint. The observed images result from Options:
  A) reflection only
  B) refraction only
  C) diffraction and interference
  D) reflection and refraction
  E) reflection and diffraction
  Show Answer
  The correct answer is A .
• Question 692: The device in which one circuit controls another, especially if the current in the second circuit is large or dangerous is known as Options:
  A) Electromagnetic devices
  B) Magnetic relay device
  C) None at all
  D) Sextant
  Show Answer
  The correct answer is B .
• Question 693: The equation of a wave is y = 0.005 sin[x(0.5X - 200t)] where x and y are in meters and t is in seconds. What is the velocity of the wave? Options:
  A) 4000ms^-1
  B) 400ms^-1
  C) 250ms^-1
  D) 40ms^-1
  Show Answer
  The correct answer is B .
• Question 694: Two lamps are rated 40W and 220V each are connected in series. The total power dissipated in both lamps is Options:
  A) 10W
  B) 20W
  C) 40W
  D) 80W
  E) None of the above
  Show Answer
  The correct answer is D .
• Question 695: Electric charges on the surface of a conductor would be most evenly distributed if the shape of the conductor is Options:
  A) conical
  B) cubical
  C) cylindrical
  D) parabolic
  E) spherical
  Show Answer
  The correct answer is C .
• Question 696:

  A body starts from rest and moves with uniform acceleration of 6ms^-2. What distance does it cover in the third seconds

  Options:
  A) 15m
  B) 18m
  C) 27m
  D) 30m
  Show Answer
  The correct answer is A .
• Question 697:
  

  In the figure, the value of R is

  Options:
  A) 3$\mathrm{\Omega }$
  B) 6$\mathrm{\Omega }$
  C) 4$\mathrm{\Omega }$
  D) 5$\mathrm{\Omega }$
  Show Answer
  The correct answer is B .
• Question 698: If the refractive index of crown glass is 1.51, its critical angel is. Options:
  A) 48.6°
  B) 22.5°
  C) 41.5°
  D) 45.0°
  Show Answer
  The correct answer is C .
• Question 699: The primary aim in high tension transmission is to Options:
  A) minimize electrical energy losses due to heat production
  B) increase the rate of energy transfer by using high voltage
  C) increase the current in the wire
  D) generate electricity at high current and low voltage
  Show Answer
  The correct answer is A .
• Question 700: A boy timed 30 oscillations of a certain pendulum thrice and obtained 1min. 10s, 1min. 12s and 1min. 7s respectively.The mean period of oscillation of the pendulum is Options:
  A) 0.14s
  B) 0.43s
  C) 2.32s
  D) 6.97s
  Show Answer
  The correct answer is C .