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 21:

  For the correction of myopic defects in the human eye we require

  Options:
  A) a convex lens
  B) a concave lens
  C) a combination of concave and convex lenses
  D) a prism
  E) a concave mirror
  Show Answer
  The correct answer is B .
• Question 22: A rocket burns fuel at the rate of 10kgs^-1 and ejects it with velocity of 5 x 10³ms^-1. The thrust exerted by the gas on the rock is Options:
  A) 2.5 x 10⁷N
  B) 5.0 x 10⁴N
  C) 5.0 x 10²N
  D) 2.0 x 10^-3N
  Show Answer
  The correct answer is B .
• Question 23: 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 24:

  A balloon inflated with helium gas at ground level is released. As it rises through a constant temperature atmosphere.

  Options:
  A) its pressuren reduces but volume remains constant
  B) te product of pressure and volume remains constant
  C) both pressure and volume increases
  D) its pressure remains constant but the volume decreases
  E) both pressure and volume remains constant
  Show Answer
  The correct answer is B .
• Question 25:

  An open-tube mercury manometer is used to measure the pressure in a gas tank. When the atmospheric pressure is 101,325 $P_a$, what is the absolute pressure in $P_a$ in the tank if the height of the mercury in the open tube is 25 cm higher. density of mercury = $13600kg/m^3,g=9.8m/s^2$

  Options:
  A) 108,986 Pa
  B) 165,238 Pa
  C) 122,364 Pa
  D) 134,645 Pa
  Show Answer
  The correct answer is D .
• Question 26: In alternating current circuit at resonance, the angel of lead or lag is Options:
  A) π°
  B) (π)/2°
  C) (π)/3°
  D) 0°
  Show Answer
  The correct answer is B .
• Question 27:

  The Earth's magnetic equator passes through Jos in Nigeria. At Jos, the

  Options:
  A) angle of variation is zero
  B) magnetic declination is 90
  C) angle of dip is zero
  D) horizontal component at the Earth's field is zero
  Show Answer
  The correct answer is C .
• Question 28: A particle moves in a circular orbit of radius 0.02m. If the speed of the particle is 0.88ms^-1, calculate its frequency in cycles per second Options:
  A) 2.0Hz
  B) 7.0Hz
  C) 8.8Hz
  D) 14.0Hz
  E) 17.6Hz
  Show Answer
  The correct answer is B .
• Question 29:

  The pin-hole camera produces a less sharply defined image when the

  Options:
  A) pin-hole is larger
  B) illumination is less
  C) screen is further from the pin-hole
  D) object is further from the pin-hole
  Show Answer
  The correct answer is A .
• Question 30: A man standing on a lift that is descending does not feel any weight because Options:
  A) the inside of the lift is air tight
  B) the lift is in vacuum
  C) there is no reaction from the floor of the lift
  D) there is no gravitational pull on the man in the lift
  Show Answer
  The correct answer is C .