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 1711: A given mass of an ideal gas occupies a volume V at a temperature T and under a pressure p. If the pressure is increased to 2p and the temperature reduced to $\frac{1}{2T}$, then the percentage change in the volume of the gas is Options:
  A) 0%
  B) 25%
  C) 75%
  D) 300%
  E) 400%
  Show Answer
  The correct answer is C .
• Question 1712:

  If a light wave has a wavelength of 500nm in air what is the frequency of the wave?

  [c = 3 x 10⁸ ms^-1]

  Options:
  A) 3.0 x 10¹⁴ Hz
  B) 6.0 x 10¹⁴ Hz
  C) 6.0 x 10¹² Hz
  D) 2.5 x 10¹⁴ Hz
  Show Answer
  The correct answer is B .
• Question 1713: A wheel and an axle is used to raise a load whose weight is 800N when an effort of 250N is applied. If the radii of the wheel and axle are 800mm and 200mm respectively, the efficiency of the machine is Options:
  A) 90%
  B) 80%
  C) 85%
  D) 87%
  Show Answer
  The correct answer is B .
• Question 1714: Which of the following types of motion is/are exhibited by a cylindrical drum rolling down an incline plane? Options:
  A) Random and rotational
  B) Rotational and oscillatory
  C) Rotational only
  D) Translations only
  E) Translational and rotational
  Show Answer
  The correct answer is E .
• Question 1715: A vehicle of mass m is driven by an engine of power P from rest. Find the minimum time it will take to acquire a speed Options:
  A) $\frac{m{v}^2}{t}$
  B) $\frac{m{v}^2}{2t}$
  C) $\frac{mv}{t}$
  D) $\frac{mv}{2t}$
  Show Answer
  The correct answer is A .
• Question 1716:

  A simple pendulum, has a period of 5.77 seconds. When the pendulum is shortened by 3 m, the period is 4.60 seconds. Calculate the new length of the pendulum

  Options:
  A) 5.23 m
  B) 6.42 m
  C) 4.87 m
  D) 7.26 m
  Show Answer
  The correct answer is A .
• Question 1717: Two forces A and B act at a point. If their resultant is [given by] (B - A) in the direction of B, then Options:
  A) A and B are equal
  B) A is greater than B
  C) the angle between A and B is 0°
  D) the angle between A and B is 90°
  E) the angle between A and B is 180°
  Show Answer
  The correct answer is E .
• Question 1718:

  The temperature gradient across a copper rod of thickness 0.02m, maintained at two temperature junctions of 20º and 80ºC respectively is?

  Options:
  A) 3.0 x 10${}^2$km${}^{-1}$
  B) 3.0 x 10${}^3$km${}^{-1}$
  C) 5.0 x 10${}^3$km${}^{-1}$
  D) 3.0 x 10${}^4$km${}^{-1}$
  Show Answer
  The correct answer is B .
• Question 1719: the ratio of electrostatic force F_E to gravitational force F_G between two protons each of charge e and mass m, at a distance d is Options:
  A) e/4πԐoGm
  B) e²/Gm²
  C) Gm²/4πԐoe²
  D) e²/4πԐoeGm²
  Show Answer
  The correct answer is D .
• Question 1720:

  The surface temperature of a swimming pool on a warm day is 25ºC and the temperature at the bottom is 15ºC. If the swimming pool has a surface area of 620 $m^2$ and a depth of 1.5m. Find the rate at which energy is transferred by conduction from the surface to the bottom of the swimming pool.

  [Thermal conductivity of water (k) = 0.6071 Wm-1K-1]

  Options:
  A) 2.5kw
  B) 250kw
  C) 300kw
  D) 3.0kw
  Show Answer
  The correct answer is A .