Physics Past Questions v36 for (JAMB/WAEC/NECO)

Physics Past Questions v36 For (JAMB/WAEC/NECO); These Physics past questions are for students who are sitting for the following examinations

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Physics Past Questions v36 For (JAMB/WAEC/NECO)

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#1. Which of the following sources of energy is/are exhausible? i. Solar ii. Fossil fuels iii. Tidal power

A) i, ii and iii

A) i, ii and iii

B) i and ii only

B) i and ii only

C) i and iii only

C) i and iii only

D) ii and iii only

D) ii and iii only

#2. Fusion is not usually used for generating electric power because

A) no energy is released when fusion takes place

A) no energy is released when fusion takes place

B) very high temperatures are required to initiate fusion reaction

B) very high temperatures are required to initiate fusion reaction

C) the raw materials needed is not easily available

C) the raw materials needed is not easily available

D) heavy nuclei are involved

D) heavy nuclei are involved

#3. The diagram above shows the speed-time graph of a car.If the car covered a total distance of 600m in 25s, calculate its maximum speed

A) 30ms-1

A) 30ms-1

B) 25ms-1

B) 25ms-1

C) 20ms-1

C) 20ms-1

D) 15ms-1

D) 15ms-1

#4. Determine the magnitude of P in the diagram above

A) 16N

A) 16N

B) 20N

B) 20N

C) 32N

C) 32N

D) 40N

D) 40N

#5. Which of the following statements about a bar magnet is correct?

A) iron fillings cling uniformly along the length of a bar magnet

A) iron fillings cling uniformly along the length of a bar magnet

B) the magnetic properties are more pronounced at the middle of a magnet

B) the magnetic properties are more pronounced at the middle of a magnet

C) it is impossible to have the same poles at the end of a magnet

C) it is impossible to have the same poles at the end of a magnet

D) the magnetic properties are more pronounced at points near the end of the bar

D) the magnetic properties are more pronounced at points near the end of the bar

#6. The breaking up of an atomic nucleus into the fragment of nearly equal size is known as

A) nuclear fusion

A) nuclear fusion

B) nuclear fission

B) nuclear fission

C) thermonuclear reaction

C) thermonuclear reaction

D) natural radioactivity

D) natural radioactivity

#7. A 500kV is applied across an X-ray tube. Calculate the maximum velocity of the electrons produced [Me = 9.1 x 10-31kg, e = 1.6 x 10-19C]

A) 4.2 x 108ms-1

A) 4.2 x 108ms-1

B) 1.9 x 108ms-1

B) 1.9 x 108ms-1

C) 4.2 x 105ms-1

C) 4.2 x 105ms-1

D) 1.8 x 105ms-1

D) 1.8 x 105ms-1

#8. A radioactive substance of mass 768g has a half life of 3 years. After how many years does this substance leave only 6g undecayed?

A) 21

A) 21

B) 18

B) 18

C) 15

C) 15

D) 12

D) 12

#9. Which of the following factors does not affect the capacitance of a parallel plate capacitor?

A) area of the plates

A) area of the plates

B) nature of the surface of the plates

B) nature of the surface of the plates

C) distance of separation between the plates

C) distance of separation between the plates

D) nature of the insulating material between the plates

D) nature of the insulating material between the plates

#10. a cell of e.m.f. 1.5V and internal resistance 1.0 omega is connected to two resistor of resistance 2.0 omega and 3.0 omega in series. Calculate the current through the resistors

A) 0.25A

A) 0.25A

B) 0.30A

B) 0.30A

C) 0.35A

C) 0.35A

D) 0.50A

D) 0.50A

#11. Which of the following distances is usually adjustable in the camera? The distance between the

A) lens and the film

A) lens and the film

B) diaphragm and the shutter

B) diaphragm and the shutter

C) shutter and the film

C) shutter and the film

D) diaphragm and the film

D) diaphragm and the film

#12. A travelling microscope is focused on a mark on a table. If a glass block of thickness 18.0cm is placed on the mark by how many centimeters will the microscope be moved upwards so as to focus the mark once again? [refractive index of glass = 1.5]

A) 27cm

A) 27cm

B) 24cm

B) 24cm

C) 9cm

C) 9cm

D) 6cm

D) 6cm

#13. In which of the following media would sound wave travel fastest?

A) wood

A) wood

B) water

B) water

C) iron

C) iron

D) mercury

D) mercury

#14. Which of the following actions is necessary in order to tune a string to produce a note of an octave higher than its fundamental?

A) doucling the length of the string

A) doucling the length of the string

B) reducing the tension by half

B) reducing the tension by half

C) reducing the mass per unit length

C) reducing the mass per unit length

D) increasing the tension four times

D) increasing the tension four times

#15. The acceleration due o gravity may be defined as the force

A) of attraction of the sun and on the earth

A) of attraction of the sun and on the earth

B) with which the earth revolves around the sun

B) with which the earth revolves around the sun

C) with which the earth attracts one kilo-gram mass

C) with which the earth attracts one kilo-gram mass

D) of the moon on the earth

D) of the moon on the earth

#16. a note of frequency 2000Hz has a velocity of 400 ms-1. calculate the wavelength of the note

A) 5.0m

A) 5.0m

B) 2.0m

B) 2.0m

C) 0.5m

C) 0.5m

D) 0.2m

D) 0.2m

#17. The eclipse of the moon occurs when the

A) moon comes exactly between the earth and the sun

A) moon comes exactly between the earth and the sun

B) earth comes exactly between the moon and the sun

B) earth comes exactly between the moon and the sun

C) sun comes exactly between the earth and the moon

C) sun comes exactly between the earth and the moon

D) moon reflects all the rays from the sun onto the earth

D) moon reflects all the rays from the sun onto the earth

#18. Which of the following observations cannot be explained using the rectilinear propagation of light?

A) production of images by a pinhole camera

A) production of images by a pinhole camera

B) production of real images of objects by lenses

B) production of real images of objects by lenses

C) formation of an annular eclipse

C) formation of an annular eclipse

D) diffraction patterns of light

D) diffraction patterns of light

#19. The distance between the successive crests of a wave travelling at 20ms-1 is 25cm. Calculate the frequency of the wave

A) 0.8Hz

A) 0.8Hz

B) 5.0Hz

B) 5.0Hz

C) 50.0Hz

C) 50.0Hz

D) 80.0hz

D) 80.0hz

#20. A ray from a fixed object is incident on a plane mirror at an angle of 20o. If the mirror is rotated through 30o by how many degree would the reflected ray rotate?

A) 60o

A) 60o

B) 50o

B) 50o

C) 40o

C) 40o

D) 30o

D) 30o

#21. How long will it take to heat 3kg of water from 28oC to 88oC in an electric kettle taking 6a from a 220V supply? [specific heat capacity of water = 4180 J kg-1K-1]

A) 120s

A) 120s

B) 570s

B) 570s

C) 600s

C) 600s

D) 836s

D) 836s

#22. The amount of energy required to change a kilogram of ice in water without a change in temperature is

A) heat capacity of ice

A) heat capacity of ice

B) specific heat capacity

B) specific heat capacity

C) specific latent heat of vaporisation of ice

C) specific latent heat of vaporisation of ice

D) specific latent heat of fusion of ice

D) specific latent heat of fusion of ice

#23. A quantity of steam at 100oC condenses to water at the same temperature by releasing 6.9 x 104J of energy. Calculate the mass of the condensed steam. [specific latent heat of vaporization of eater = 2.3 x 106 J kg-1]

A) 3.0 x 10-1 kg

A) 3.0 x 10-1 kg

B) 3.0 x 10-2 kg

B) 3.0 x 10-2 kg

C) 3.0 x 10-3 kg

C) 3.0 x 10-3 kg

D) 3.0 x 10-4 kg

D) 3.0 x 10-4 kg

#24. The temperature of a liquid falls after some of it has evaporated because

A) the liquid left is smaller in volume and the breeae easily cools it

A) the liquid left is smaller in volume and the breeae easily cools it

B) the more energetic molecules have escaped into the atmosphere

B) the more energetic molecules have escaped into the atmosphere

C) the liquid left has less latent heat

C) the liquid left has less latent heat

D) after evaporation impurites are left behind

D) after evaporation impurites are left behind

#25. The S.I units of frequency, period and amplitude of a wave are respectively

A) hertz, second and centimeter

A) hertz, second and centimeter

B) second, metre and hertz

B) second, metre and hertz

C) metre, hertz and seconds

C) metre, hertz and seconds

D) hertz, second and metre

D) hertz, second and metre

#26. The engine of a train produces a force of 3000N when moving at 30.ms-1. calculate the power of the engine

A) 1.00 x 102W

A) 1.00 x 102W

B) 3.00 x 104W

B) 3.00 x 104W

C) 9.00 x 104W

C) 9.00 x 104W

D) 3.00 x 105W

D) 3.00 x 105W

#27. The sagging of overhead electrical cables is the consequence of

A) linear expansivity

A) linear expansivity

B) superficial expansivity

B) superficial expansivity

C) cubic expansivity

C) cubic expansivity

D) conductivity

D) conductivity

#28. Which of the following statements about the mouth piece of a telephone is correct? It converts sound energy into

A) acoustic energy

A) acoustic energy

B) mechanival energy

B) mechanival energy

C) electrical energy

C) electrical energy

D) heat energy

D) heat energy

#29. A moving car of mass 800 kg experiences a frictional force of 200N. If it accelerates 2 ms-2, calculate the magnitude of the force applied to the car

A) 600N

A) 600N

B) 1000N

B) 1000N

C) 1600N

C) 1600N

D) 1800N

D) 1800N

#30. Uniform speed occurs when there is equal change of

A) distance in equal times

A) distance in equal times

B) displacement in equal times

B) displacement in equal times

C) velocity in equal times

C) velocity in equal times

D) acceleration in equal times

D) acceleration in equal times

#31. A car accelerates uniformly from rest at 5 ms-2. Determine its speed after 10s

A) 50.0ms-1

A) 50.0ms-1

B) 25.0ms-1

B) 25.0ms-1

C) 2.0ms-1

C) 2.0ms-1

D) 0.5ms-1

D) 0.5ms-1

#32. Which of the following quantities is a vector?

A) speed

A) speed

B) distance

B) distance

C) energy

C) energy

D) momentum

D) momentum

#33. which of the following statements about simple harmonic motion is correct? The

A) total mechanical energy is always conserved

A) total mechanical energy is always conserved

B) linear acceleration is directed to any variable point

B) linear acceleration is directed to any variable point

C) linear acceleration varies inversely with displacement

C) linear acceleration varies inversely with displacement

D) period of oscillation varies linearly as acceleration due to gravity

D) period of oscillation varies linearly as acceleration due to gravity

#34. A solid body will float in a liquid if its

A) density is less than that of a liquid

A) density is less than that of a liquid

B) mass is equal to that of the liquid

B) mass is equal to that of the liquid

C) density is greater than that of the liquid

C) density is greater than that of the liquid

D) mass is less than that of the liquid

D) mass is less than that of the liquid

#35. An object is said to undergo oscillatory motion when it moves

A) in an erratic manner

A) in an erratic manner

B) to and fro about a fixed point

B) to and fro about a fixed point

C) in a circular path

C) in a circular path

D) along a continuous path from the starting point

D) along a continuous path from the starting point

#36. A body is rotating in a horizontal circle of radius 2.5m with an angular speed of 5 rad s-1. Calculate the magnitude of the radial acceleration of the body

A) 62.50ms-2

A) 62.50ms-2

B) 31.25ms-2

B) 31.25ms-2

C) 12.50ms-2

C) 12.50ms-2

D) 10.00ms-2

D) 10.00ms-2

#37. Which of the following phenomena causes capillary of liquids in tubes of narrow bore?

A) viscosity

A) viscosity

B) surface tension

B) surface tension

C) osmosis

C) osmosis

D) brownian motion

D) brownian motion

#38. Which of the following source of energy is renewable?

A) sun

A) sun

B) petroleum

B) petroleum

C) coal

C) coal

D) uranium

D) uranium

#39. A force acting on a body causes a change in the momentum of the body from 12kg ms-1 to 16kg ms-1 in 0.2s. calculate the magnitude of the force

A) 140.0N

A) 140.0N

B) 20.0N

B) 20.0N

C) 4.0N

C) 4.0N

D) 0.8N

D) 0.8N

#40. Which of the following physical processes cannot be explained by the molecular theory of matter?

A) evaporation

A) evaporation

B) thermal conduction

B) thermal conduction

C) radiation of heat

C) radiation of heat

D) convectional current of fliuds

D) convectional current of fliuds

#41. The diagram represents a block-and-tackle pulley system on which an effort of 50N is just able to lift a load of weight W. If the efficiency of the machine is 40%. find the value of W

A) 300N

A) 300N

B) 200N

B) 200N

C) 140N

C) 140N

D) 120N

D) 120N

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