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 1271: At what respective values of X, Y and Z would the unit of force, the newton, be dimensionally equivalent to M^xL^yT^z? Options:
  A) -1, 1, 2
  B) 1, 1, -2
  C) 1, -1, 2
  D) -1, 1, -2
  Show Answer
  The correct answer is B .
• Question 1272: Three electric cells each of e.m.f 1.5V and internal resistance of 1.0$\mathrm{\Omega }$ are connected in parallel across an external resistance of $\frac{2}{3}$$\mathrm{\Omega }$. Calculate the value of the current in the resistor Options:
  A) 0.5 A
  B) 0.9A
  C) 1.5A
  D) 4.5A
  Show Answer
  The correct answer is C .
• Question 1273: Two liquids, P at a temperature of 20^oC and Q at a temperature of 80^oC have specific heat capacities of 1.0Jkg^-1oC^-1 and 1.5J kg^-1oC^-1respectively. if equal masses of P and Q are mixed in a lagged calorimeter, then the equilibrium temperature is Options:
  A) 44^oC
  B) 50^oC
  C) 56^oC
  D) 60^oC
  E) 70^oC
  Show Answer
  The correct answer is C .
• Question 1274:

  A piece of substance of specific heatcapacity 450Jkg${}^{-1}$k${}^1$ falls through a vertical distance of 20m from rest. Calculate the rise in temperature of the substance on hitting the ground when all its energies are converted into heat. [g = 10ms${}^{-2}$]

  Options:
  A) $\frac{2}{9}$ºC
  B) $\frac{4}{9}$ºC
  C) $\frac{9}{2}$ºC
  D) $\frac{9}{4}$ºC
  Show Answer
  The correct answer is B .
• Question 1275:

  

  Which of the following figures gives the correct resultant R of two vectors P and Q?

  Options:
  A) I
  B) II
  C) III
  D) IV
  E) V
  Show Answer
  The correct answer is D .
• Question 1276: The surfaces of conveyor belts are made rough so as to Options:
  A) protect them while carrying loads
  B) prevent the loads from slipping
  C) enable them to carry more load
  D) make them stronger
  Show Answer
  The correct answer is B .
• Question 1277: A cell of e.m.f 12V and internal resistance 4Ω is connected to an external resistor of resistance 2Ω. Find the current flow. Options:
  A) 5 A
  B) 4 A
  C) 3 A
  D) 2 A
  Show Answer
  The correct answer is D .
• Question 1278: Which of the following gas laws is equivalent to the work done? Options:
  A) Boyle' law
  B) Charles law
  C) Pressure law
  D) van der Waal's law
  Show Answer
  The correct answer is A .
• Question 1279:

  A progressive wave equation is represented by y = a sin(150 πt - πx/4). if the phase difference of a progressive wave is 45°, the value of x in the equation is

  Options:
  A) 3 cm
  B) 4 cm
  C) 1 cm
  D) 2 cm
  Show Answer
  The correct answer is C .
• Question 1280:

  

  A body of mass 40kg is being dragged along the floor by a rope inclined at 60 degrees to the horizontal. The frictional force between the box and the floor is 100N and the tension on the rope is 300N. How much work is done by dragging the box for a distance of 4m

  Options:
  A) 680J
  B) 400J
  C) 200J
  D) 100J
  Show Answer
  The correct answer is C .