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Updated on January 12, 2024

Physics Past Questions v15 for (JAMB/WAEC/NECO)

Physics Past Questions v15 For (JAMB/WAEC/NECO); These Physics past questions are for students who are sitting for the following examinations

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  • NECO
  • WAEC GCE
  • NECO GCE
  • NABTEB
  • NABTEB GCE

Physics Past Questions v15 For (JAMB/WAEC/NECO)

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#1. Which of the following statements is true of the diagram shown above?

#2. In which of the following is a stationary wave produced? i. A vibrating turning fork held near the end of a resonance tube closed at one end. ii. A string tightly stretched between two points and plucked at its middle. iii. The tuning fork vibrating in air

#3. Which of the following are true of plane-polarised right? i. Plane polarisation of light is the formation of hydrogen bubbles on the particle of light. ii. Plane components. iii. A plane polarised light vibrates in one plane. iv. Polarisation of light is characteristic of transverse vibration

#4. Which of the following statements is not correct? Isotopes of an element have

#5. A man standing 510m away from a wall sounds a whistle. The echo from the wall reaches him 3s later. Calculate the velocity of sound in air.

#6. The half-life of a radioactive substance is 2 seconds. Calculate the decay constant.

#7. Find the tension T1 in the diagram above if the system is in equilibrium. [G = 10ms-2]

#8. A body is under action of a force F such that the force displacement graph of the body is semi circular as shown above. The work done on the body by the force in moving through 24 meters is

#9. The internal resistance of each of the cells E1 and E2 Shown in the figure above is 2 Ohm. Calculate the total current in the circuit

#10. The net capacitance of the circuit shown above is

#11. In the above circuit, The fuse wire melts when

#12. Which of the following phenomena is called photoelectric effect?

#13. which of the following statements are TRUE of isotopes? i. isotopes of an element have the same chemical properties because they have the same number of electrons. ii. isotopes of elements are normally separated using physical properties. iii. isotopes of an element have the same number of protons in their nuclei.

#14. When an atom loses or gains a charge, it becomes

#15. In a nuclear fusion process, four protons each of mass Mp were fused to produce a nucleus X of mass Mx. Which of the following equations is CORRECT?

#16. Which of the following obeys Ohm's Law?

#17. An equipment whose power is 1500W and resistance is 375 ohms would draw a current of

#18. To convert an alternating current dynamo into a direct current dynamo, the

#19. If a current carrying coil is mounted on a metal frame, the back e.m.f. induced in the coil causes

#20. The electrochemical equivalent of platinum is 5.0 x 10-7kgC-1 to plate-out 1.0kg of platinum, a current of 100A must be passed through an appropriate vessel for

#21. When the bottom tip of a vibrating tuning fork is held in contact with a wooden box, a louder sound is heard. This phenomenon is known as

#22. Which of the following statements is CORRECT about the earth's magnetic field?

#23. An insulated rod when rubbed with a material acquires

#24. The function of the system of granulated carbon mixed with manganese (IV) oxide in a Letanche cell is to

#25. In a ray diagram for a thin converging lens, a ray that is not parallel to the optic axis but passes through the optic center will

#26. Which of the following correctly, describes the image of an object, 4cm from a diverging lens of focal length 12cm?

#27. Two tuning forks of frequency 256Hz and 260Hz are sounded close to each other. What is the frequency of the beats produced?

#28. A man hears his echo from a nearby hill 2s after he shouted. If the frequency of his voice is 260Hz and the wavelength is 1.29m, how far away is the hill?

#29. A room is heated by means of a charcoal fire, An occupant of the room standing away from the fire is warmed mainly by

#30. A boy timed 30 oscillations of a certain pendulum thrice and obtained 1min. 10s, 1min. 12s and 1min. 7s respectively.The mean period of oscillation of the pendulum is

#31. Which of the following is TRUE of light and sound waves?

#32. The image in a pin-hole camera is

#33. A brass rod is 2m long at a certain temperature. What is the length for a temperature rise of 100K, if the expansivity of brass is 18 x 10-6K-1?

#34. What is the difference in the amount of heat given out by 4kg of steam and 4kg of water when both are cooled from 100oC to 80oC? [the specific latent heat of steam is 2,260,000Jkg-1, specific heat capacity of water is 4200Jkg-1K-1]

#35. How long does it take a 750W heater to raise the temperature of 1kg of water from 20oC to 50oC [specific heat capacity of water = 4200Jkg-1K-1]

#36. The saturated vapour pressure of a liquid increases as the

#37. The spiral spring of a spring balance is 25.0cm long when 5N hangs on it and 30cm long, when the weight is 10N. What is the length of the spring if the weight is 3N assuming Hooke's law is obeyed?

#38. The mass of a stone is 15.0g when completely immersed in water and 10.0g when completely immersed in a liquid of relative density 2.0. The mass of the stone in air is

#39. A pilot records the atmospheric pressure outside its plane as 63cm of Hg while a ground observer records a reading of 75cm of Hg for the atmospheric pressure on the ground. Assuming that the density of the atmosphere is constant, calculate the height of the plane above the ground. (Relative density of Hg = 13.0 and that of air = 0.00013)

#40. In which of the following is surface tension important?

#41. A thermometer with an arbitrary scale S, of equal division registers -30oS at the ice point and +90oS at the steam point. Calculate the Celsius temperature corresponding to 60oS

#42. An object moves with uniform speed round a circle. Its acceleration has

#43. A body of mass 100g moving with a velocity of 10.0ms-1 collides with a wall. If after collision, it moves with a velocity of 2.0ms-1 in the opposite direction, calculate the change in momentum.

#44. A spring of force constant 1500Nm-1 is acted upon by a constant force of 75N. Calculate the potential energy stored in the string

#45. A wheel and axle have radii 80cm and 10cm respectively. If the efficiency of the machine is 0.85, an applied force of 1200N to the wheel will raise a load of

#46. A 20kg mass is to be pulled up a slope inclined at 30o to the horizontal. If the efficiency of the plane is 75%, the force required to pull the load up the plane is [g = 10ms-2]

#47. Which of the following is the most suitable for use as an altimeter?

#48. A small metal ball thrown vertically upwards from the top of a tower with an initial velocity of 20ms-1. If the ball took a total of 6s to reach ground level, determine the height of the tower [g = 10ms-2]

#49. An object is dropped from the top of a tower. If it takes 4s for it to reach the ground, calculate the height of the tower.(g = 10 ms-2, ignore air resistance)

#50. A block and tackle system has six pulleys. a force of 50N applied to it lifts a load of weight W. If the efficiency of the system is 40%, calculate W

#51. What type of motion does the skin of a 'talking' drum perform when it is struck with a drum stick?

#52. Which of the following physical qualities affects the saturated vapour pressure of a liquid ?

#53. a pilot records the atmospheric pressure outside his plane as 63cm of Hg while a ground observer records a reading of 75cm of Hg with his barometer. Assuming that the density of air is constant, calculate the height of the plane above the ground. (take the relative densities of air and mecury as 0.00136 and 13.6 respectively)

#54. The half-life of a radioactive substance is 2 seconds. Calculate the decay constant

#55. The work function of a metal is 4.65ev and the metal is illuminated with a radiation of 6.86ev. What is the kinetic energy of the electrons ejected from the surface of the metal?

#56. Which of the following has the highest surface tension?

#57. The unit of stress is

#58. When a metal surface is irradiated, photoelectrons may be ejected from the metal. The kinetic energy of the ejected electrons depends on the

#59. A 90W immersion heater is used to supply energy for 5 minutes. The energy supplied is used to completely melt 160g of a solid at its melting point. Calculate the specific latent heat of the solid.

#60. In the circuit above R is a resistor whose resistance increases with increases with increase in temperature L1 and L2 are identical lamps. If the temprature of R increases

#61. A house is supplied with a 240V a.c mains. To operate a door bell rated at 8v, a transformer is used if the number of turns in the primary coil of the transformer is 900. calculate the number of turns in the secondary coil of the transformer

#62. The diagram above shows a current carrying wire between the poles of a magnet. In which direction would the wire tend to move?

#63. An induction coil is generally used to

#64. Two objects of masses 80kg and 50kg are separated by a distance of 0.2m. If the gravitational constant is 6.6 x 10-11Nm kg, calculate the gravitational attraction between them.

#65. In which of the points labelled A, B, C, D and E on the conductor shown would electric charge tend to concentrate most?

#66. Which of the following is stored by dry Leclanche cell?

#67. Which of the following statements is true of the diagram shown above?

#68. A man standing 300m away from the wall sounds a whistle. The echo from the wall reaches him 1.8sec. later, calculate the velocity of sound in air

#69. A particle of charge q and mass m moving with a velocity v enters a uniform magnetic field b in the direction of the field. The force on the particle is

#70. Which of the following is not a mechanical wave?

#71. Which of the following remains unchanged as light travels from one medium to the other? i. speed. ii. wavelength. iii. frequency.

#72. The sound from a bell in an enclosed jar gradually faints away while the jar is being evacuated. Which of the following explains this observation?

#73. Calculate the refractive index of the material of the glass block shown in the diagram if YZ = 4cm

#74. An image which can be formed on a screen is said to be

#75. At which of the following distances from the lens should a slide be placed on a slide projector if f is the focal length of the projector length?

#76. what part of the camera corresponds to the iris of the eye?

#77. Two forces, whose resultant is 100N are perpendicular to each other. If one of them makes an angle of 60o with the resultant, calculate the magnitude. (Sin 60o = 0.8660, Cos 60o = 0.500)

#78. Two mirrors are inclined as shown in the diagram. A ray of light RO strikes the arrangement at O and emerges along PO. The emergent ray has been deviated through

#79. In the arrangement illustrated above, Y and B are yellow and blue transparent light filters respectively through the filters is

#80. A ray of light is incident at an angle of 30o on a glass prism of refractive index 1.5. Calculate the angle through which the ray is minimally deviated in the prism. (The medium surrounding the prism is air)

#81. A team trap is a component of the apparatus used in determining the specific latent heat of vaporisation of steam. In the steady steady state, the steam trap

#82. a tap supplies water at 26oC while another supplies water at 82oC. If a man wishes to bathe with water at 40oC the ratio of hot mass of hot water to that of cold water required is

#83. Melting ice cools an orange drink far better than the same mass of ice-cold water because

#84. The diagram above represents six maximum and minimum thermometer. If the temperature of the surrounding falls, whichs how the thermometer would respond to the change in temperature?

#85. A wire, 20m long is heated from a temperature of 5oC to 55oC. If the change in length is 0.020m, calculate the linear expansivity of the wire

#86. A water fall is 420m high. Calculate the difference in temperature of the water between the top and bottom of the water fall. Neglect heat loses(g = 10.0m-2 specific heat capacity of water = 4.20 x 10-3 JKg-1 K-1)

#87. The set-up illustrated above shows a capillary tube of uniform cross-sectional area in two different arrangements. Using the data in the diagrams. Calculate the pressure of the atmosphere

#88. A fixed mass of gas of volume 600cm3 at a temperature of 27oC is cooled at constant pressure to a temperature of 0oC. What is the change in volume?

#89. An orange fruit drops to the ground from the top of a tree 45m tall. How long does it takes to reach the ground? (g = 10ms-2)

#90. power is defined as the

#91. The product PV where P is pressure and V is volume has the same unit as

#92. A boatman facing north wants to cross a flowing river to a point directly opposite its position at the other bank. If the river is flowing eastwards, in what direction should he row his boat?

#93. Which of the following is a fundamental quantity?

#94. A body moves with a constant speed but has an acceleration. this process if it

#95. A body moving with uniform acceleration has two points(5, 15) and (20, 60) on the velocity-times graph of its motion. Calculate

#96. An electron of charge 1.6 x 1019C is accelerated in vacuum from rest at zero volt towards a plate of 40KV. Calculate the kinetic energy of the electron.

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Physics Past Questions v15 for (JAMB/WAEC/NECO)