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 1131:

  What effort will a machine of efficiency 90% apply to lift a load of 180N if its efforts arm is twice as long as its load arm?

  Options:
  A) 80N
  B) 90N
  C) 100N
  D) 120N
  Show Answer
  The correct answer is C .
• Question 1132:

  400g of cold water is added to 200g of water at 70°C. If they are properly mixed and the temperature of the mixture is 300°C. calculate the initial temperature of the cold water. (Neglect the heat absorbed by the container)

  Options:
  A) 10°C
  B) 15°C
  C) 20°C
  D) 30°C
  E) 40°C
  Show Answer
  The correct answer is A .
• Question 1133:

  

  The diagram shown represents a block-and-tackle pulley system on which an effort of W Newtons supports a load of 120.0N. If the efficiency of the machine is 40, then the value of W is?

  Options:
  A) 28.0
  B) 48.0N
  C) 233.0N
  D) 50.0N
  Show Answer
  The correct answer is D .
• Question 1134:

  The lower and upper fixed points marked on a Mercury-in-glass thermometer are 210mm apart. The end of the mercury column in the tube is 49mmabove the lower fixed point in a room. What is the temperature of the room in degrees Celsius?

  Options:
  A) 55.3${}^o$C
  B) 23.3${}^o$C
  C) 49.0${}^o$C
  D) 16.43${}^o$C
  Show Answer
  The correct answer is B .
• Question 1135: A body of mass 5kg initially at rest is acted upon by two mutually perpendicular forces 12N and 5N as shown in fig.3. If the particle moves in the direction QA, calculate the magnitude of the acceleration Options:
  A) 0.40ms^-2
  B) 1.40ms^-2
  C) 0.26ms^-2
  D) 2.60ms^-2
  E) 3.40ms^-2
  Show Answer
  The correct answer is D .
• Question 1136: A piece of iron weights 250 N in air and 200 N in a liquid of density 1000 kgm^-3. the volume of the iron is? Options:
  A) 5.0 x 10^-2 ms^-2
  B) 4.5 x 10^--2 ms^-3
  C) 2.5 x 10^-2 ms^-8
  D) 2.0 x 10^-2 ms^-3
  Show Answer
  The correct answer is C .
• Question 1137:

  

  A simple pendulum of mass m moves along an arc pf a circle radius R in a vertical plane as shown above. What is the work done by gravity in a downward swing through the angle q to 0 degree

  Options:
  A) mgR sinθ
  B) MgR (1- cos θ)
  C) mgR
  D) mgR (1 - sinθ)
  Show Answer
  The correct answer is B .
• Question 1138:

  Arrange the following in the order of their increasing frequency.I. Visible light

  II. Gamma rays

  III. Radio waves

  IV. Infra-red radiation

  V. Ultra-violet radiation

  Options:
  A) I, II, III, IV, V
  B) II, III, IV, V, I
  C) III, IV, V, I, II
  D) IV, III, I. V, II
  E) III, IV, I,V, II
  Show Answer
  The correct answer is E .
• Question 1139: A body of mass 2kg moving vertically upwards has its velocity increased uniformly from 10ms^-1 to 40ms^-1 in 4s. Neglecting air resistance, calculate the upward vertical force acting on the body.[g = 10 ms^-1] Options:
  A) 15N
  B) 20N
  C) 35N
  D) 45N
  Show Answer
  The correct answer is C .
• Question 1140: A box is pulled a distance s along a smooth horizontal floor by a force of magnitude F, inclined at an angle θ to the horizontal. The work done is Options:
  A) Fs cos θ
  B) Fs cosec θ
  C) Fs sec θ
  D) Fs sin θ
  E) Fs tan θ
  Show Answer
  The correct answer is A .