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: A car of mass 1500 kg goes round a circular curve of radius 50m at a speed of 40 ms^-1. The magnitude of the centripetal force on the car is ? Options:
  A) 4.8 x 10⁴ N
  B) 4.8 x 10³ N
  C) 1.2 x 10³ N
  D) 1.2 x 10² N
  Show Answer
  The correct answer is A .
• Question 2232: A galvanometer of internal resistance 50$\mathrm{\Omega }$ has a full scale deflection for a current of 5mA. What is the resistance required to covert it to a voltmeter with full scale deflection of 10V? Options:
  A) 1750$\mathrm{\Omega }$
  B) 1950$\mathrm{\Omega }$
  C) 2000$\mathrm{\Omega }$
  D) 2500$\mathrm{\Omega }$
  Show Answer
  The correct answer is B .
• Question 2233: A thin film of liquid is trapped between two glass plates. The force required to pull the plates apart will increase if the Options:
  A) surface tension of the liquid is reduced
  B) perpendicular distance between the plates is increased
  C) area of the liquid surface in contact with the plates is increased
  D) pressure of the air is decreased
  Show Answer
  The correct answer is C .
• Question 2234: The range of accommodation of a normal human eye is Options:
  A) 0m to 0.1m
  B) 0m to 0.25m
  C) 0.10m to 0.25m
  D) 0.10m to infinity
  E) 0.25m to infinity
  Show Answer
  The correct answer is E .
• Question 2235:

  A 500W heater is used to heat 0.6kg of water from 25^oC to 100^oC in t₂ seconds. If another 1000W heater is used to heat 0.2kg of water from 10^oC to 100^oC in t, seconds, find $\frac{t_1}{t_2}$

  Options:
  A) 50
  B) 5
  C) 5/4
  D) 1/5
  Show Answer
  The correct answer is D .
• Question 2236: Which of the following correctly explains why soft iron is proffered to steel in electromagnets? i. soft iron is more readily magnetized than steel. ii. soft iron is more readily demagnetized than steel. iii. soft iron retains magnetism more than steel. Options:
  A) i only
  B) ii and iii only
  C) i and ii only
  D) i, ii, and iii.
  Show Answer
  The correct answer is C .
• Question 2237:

  If a body moves with a constant speed and at the same time undergoes an acceleration, its motion is said to be

  Options:
  A) circular
  B) oscillatory
  C) rectilinear
  D) rotational
  Show Answer
  The correct answer is A .
• Question 2238: When a man moves toward a plane mirror at a speed of 6m/s, the distance the man and his image increased at a speed of? Options:
  A) 2 m/s
  B) 4 m/s
  C) 12 m/s
  D) 14 m/s
  Show Answer
  The correct answer is C .
• Question 2239: A beam of light is incident from air to water at an angle of 30^oC. Find the angle of refraction if the refractive index of water is $\frac{4}{3}$ Options:
  A) 15^oC
  B) 18^oC
  C) 22^oC
  D) 24^oC
  Show Answer
  The correct answer is C .
• Question 2240:

  A gas at a volume of V${}_0$ in a container at pressure p${}_0$ 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) $\frac{p_0}{5}$
  B) $\frac{4p_0}{5}$
  C) p${}_0$
  D) 5P${}_0$
  Show Answer
  The correct answer is D .