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 531: I. for current amplification.II. for voltage stabilization. III. for power amplification.IV. as a switch.which of the above are the uses of transistor? Options:
  A) I,II,III and IV
  B) I,III, and IV only
  C) I, II and III only
  D) I,II and IV only
  Show Answer
  The correct answer is B .
• Question 532: A train with an initial velocity of 20ms^-1 is subjected to a uniform deceleration of 2m^-2. The time required to bring the train to a complete halt is? Options:
  A) 5s
  B) 10s
  C) 20s
  D) 40s
  Show Answer
  The correct answer is B .
• Question 533:

  

  In a light experiment with a convex lens a student plotted a graph as shown above of the reciprocal of object distance (1)/u against the reciprocal of image distance (1)/v . the focal length of the lens is given as

  Options:
  A) slope of line PQ
  B) Reciprocal of either OP or OQ
  C) Length OP or OQ
  D) area under the graph E ratio OP/OQ
  Show Answer
  The correct answer is B .
• Question 534: A 100kg box is pushed along a road with force of 500N. If the box moves with a uniform velocity, the coefficient of friction between the box and the road is Options:
  A) 0.4
  B) 1.0
  C) 0.8
  D) 0.5
  Show Answer
  The correct answer is D .
• Question 535: If a room is saturated with water vapour, the temperature of the room must be Options:
  A) at 0^oC
  B) above the dew point
  C) at 100^oC
  D) below or at the dew point
  Show Answer
  The correct answer is D .
• Question 536:

  A relative density bottle has a mass of 19 g when empty. When it is completely filled with water, its mass is 66 g. What will be its mass if completely filled with alcohol of relative density 0.8?

  Options:
  A) 47 g
  B) 52.8 g
  C) 37.6 g
  D) 56.6 g
  Show Answer
  The correct answer is D .
• Question 537: In the diagram above, X and Y have resistances 6 and 4 ohms respectively, if the power dissipation in X is 10W then power dissipation in Y is Options:
  A) 2.4W
  B) 4
  C) 6.0W
  D) 6.7W
  E) 15.0W
  Show Answer
  The correct answer is D .
• Question 538: A satellite is in a parking orbit if its period is Options:
  A) less than the period of the earth
  B) more than the period of the earth
  C) equal to the period of the earth
  D) the square of the period of the earth
  Show Answer
  The correct answer is C .
• Question 539: Which of the following is TRUE of a particle moving in a horizontal circle with constant angular velocity? Options:
  A) The energy is costant but the linear momentum varies
  B) The linear momentum is conatant but the energy varies
  C) both energy and linear momentum are constant
  D) The speed and the linear velocity are both constant
  Show Answer
  The correct answer is C .
• Question 540: In 24 days a radioactive isotope decreases in mass from 128g to 2g. What is the half-life of the radioactive material? Options:
  A) 2.54 days
  B) 4.00 days
  C) 4.80 days
  D) 6.00 days
  E) 8.00 days
  Show Answer
  The correct answer is B .