Physics Past Questions v22 For (JAMB/WAEC/NECO); These Physics past questions are for students who are sitting for the following examinations

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#1. When the sun, moon and the earth are as shown in the diagram above an observer standing in X is in

A) Penumbra and sees a partial eclipse

A) Penumbra and sees a partial eclipse

B) Penumbra and sees a total eclipse

B) Penumbra and sees a total eclipse

C) umbra and sees a partial eclipse

C) umbra and sees a partial eclipse

D) umbra and sees a total eclipse

D) umbra and sees a total eclipse

#2. A uniform light beam XZ is Hinged at X and kept in equilibrium by the forces T and F as shown in the diagram above. if XO = 20m and OY = 30cm, express T in terms of F

A) T =2√3/3

A) T =2√3/3

B) T= 2F

B) T= 2F

C) T = 5V3F/3

C) T = 5V3F/3

D) T = 5F

D) T = 5F

#3. For a rough inclined plane on which lies a body of weight W, the angle θ in the diagram above becomes the angle of friction if

A) tan θ = coefficient of static friction

A) tan θ = coefficient of static friction

B) cos θ = coefficient of dynamic friction

B) cos θ = coefficient of dynamic friction

C) sin θ = coefficient of sliding friction

C) sin θ = coefficient of sliding friction

D) sec θ = limiting frictional force

D) sec θ = limiting frictional force

#4. The diagram above shows two wave forms P and Q at a particular instant in time. the two waves will interface

A) destructively to produce a wave of larger amplitude

A) destructively to produce a wave of larger amplitude

B) destructively to produce a wave of smaller amplitude

B) destructively to produce a wave of smaller amplitude

C) constructively to produce a wave of larger amplitude

C) constructively to produce a wave of larger amplitude

D) constructively to produce a wave of smaller amplitude

D) constructively to produce a wave of smaller amplitude

#5. The following are the scores of ten students in a test of 20 marks: 15, 16, 17, 13, 16, 8, 5, 16, 19, 17. What is the modal?

A) 13

A) 13

B) 15

B) 15

C) 16

C) 16

D) 19

D) 19

#6. Find the standard deviation of the following data -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5

A) 2

A) 2

B) 3

B) 3

C) √10

C) √10

D) √11

D) √11

#7. One of the features of the fission process is that

A) its products are not radioactive

A) its products are not radioactive

B) it leads to chain reaction

B) it leads to chain reaction

C) neutrons are not released

C) neutrons are not released

D) the sum of the masses of the reactants equals the sum of masses of the products

D) the sum of the masses of the reactants equals the sum of masses of the products

#8. The graphite rods surrounding the uranium fuel rods in a nuclear reactor, are used to

A) absorb the neutrons and hence halt the nuclear process

A) absorb the neutrons and hence halt the nuclear process

B) create the neutrons and hence slow up the nuclear process

B) create the neutrons and hence slow up the nuclear process

C) slowdown the neutrons and hence slow up the nuclear process

C) slowdown the neutrons and hence slow up the nuclear process

D) speed up the neutrons and hence speed up the nuclear process

D) speed up the neutrons and hence speed up the nuclear process

#9. What is the total electrical energy consumed by using an electric cooker rated 1000W for 5 hrs?

A) 5.3 x 103J

A) 5.3 x 103J

B) 6.5 X 103J

B) 6.5 X 103J

C) 1.8 X 107J

C) 1.8 X 107J

D) 2.3 X 107J

D) 2.3 X 107J

#10. The power dissipated in an a.c. circuit with an r.m.s, current of 5A, r.m.s voltage of 10V and a phase angle of 60o is

A) 25W

A) 25W

B) 50W

B) 50W

C) 120W

C) 120W

D) 125W

D) 125W

#11. In a purely inductive circuit, the current

A) lags behind the voltage in phase by 90o

A) lags behind the voltage in phase by 90o

B) leads the voltage in phase by 90o

B) leads the voltage in phase by 90o

C) is in the same phase with the voltage

C) is in the same phase with the voltage

D) leads the voltage by 180o

D) leads the voltage by 180o

#12. The electromagnetic waves that are sensitive to temperature changes are

A) X-rays

A) X-rays

B) Gamma-rays

B) Gamma-rays

C) Ultra-violet rays

C) Ultra-violet rays

D) Infra-red rays

D) Infra-red rays

#13. Under constant tension and constant mass per unit length, the note produced by a plucked string is 500Hz when the length of the string is 0.90m. At what length is the frequency 150Hz?

A) 3m

A) 3m

B) 4m

B) 4m

C) 5m

C) 5m

D) 6m

D) 6m

#14. The colours seen in the thin films of oil on the road and in soap bubbles are due to

A) reflection

A) reflection

B) interference

B) interference

C) diffraction

C) diffraction

D) polarization

D) polarization

#15. If the load at the end of a sonometer wire is immersed in a bucket of water, the original fundamental frequency of the wire could be restored by

A) decrease the length of the wire

A) decrease the length of the wire

B) increasing the length of the wire

B) increasing the length of the wire

C) increasing the mass per unit length of the wire

C) increasing the mass per unit length of the wire

D) changing the temperature of the wire

D) changing the temperature of the wire

#16. A boy on looking into a mirror observed that his face appeared to have grown bigger. The boy must have been looking at a

A) convex mirror with his face at the focus

A) convex mirror with his face at the focus

B) concave mirror with his face between the focus and the mirror

B) concave mirror with his face between the focus and the mirror

C) concave mirror with his face at the focus

C) concave mirror with his face at the focus

D) convex mirror with his face between the focus and the mirror

D) convex mirror with his face between the focus and the mirror

#17. Light of velocity 3 x 108ms-1 is incident on a material of reflective of index n. If the velocity of light is reduced to 2.4 x 108ms-1 in the material, what is n?

A) 2.33

A) 2.33

B) 2.25

B) 2.25

C) 1.33

C) 1.33

D) 1.25

D) 1.25

#18. What happens when a, certain quantity of pure ice is completely changed to water at 0oC?

A) latent heat is absorbed, the mass remains constant, and the volume decreases

A) latent heat is absorbed, the mass remains constant, and the volume decreases

B) latent heat is given out, the mass remains constant and the volume decreases

B) latent heat is given out, the mass remains constant and the volume decreases

C) latent heat is given out, the mass increases and the volume remains constant

C) latent heat is given out, the mass increases and the volume remains constant

D) latent heat is absorbed, the mass decreases and the volume increases

D) latent heat is absorbed, the mass decreases and the volume increases

#19. A heating coil rated at 100W is used to boil off 0.5kg of boiling water. The time taken to boil off the water is [specific latent heat of vaporization of water = 2.3 x 106Jkg-1]

A) 1.15 x 109 s

A) 1.15 x 109 s

B) 1.15 x 107 s

B) 1.15 x 107 s

C) 1.15 x 105 s

C) 1.15 x 105 s

D) 1.15 x 104 s

D) 1.15 x 104 s

#20. A mass of a liquid at 30oC is mixed with a mass of the same liquid at 70oC and the temperature of the mixture is 45oC. Find the ratio of the mass of the cold liquid to the mass of the other liquid.

A) 3 : 5

A) 3 : 5

B) 5 : 3

B) 5 : 3

C) 3 : 7

C) 3 : 7

D) 7 : 3

D) 7 : 3

#21. What happens when a gas expands at constant temperature?

A) its pressure decreases

A) its pressure decreases

B) the total momentum of its molecules remains constant

B) the total momentum of its molecules remains constant

C) its pressure decreases and the total momentum of its moleculees remains constant

C) its pressure decreases and the total momentum of its moleculees remains constant

D) its pressure decreses and the total kinetic energy of its molecule decreases

D) its pressure decreses and the total kinetic energy of its molecule decreases

#22. Ripples on water and light waves are similar because both

A) have the same frequency

A) have the same frequency

B) can be refracted and diffracted

B) can be refracted and diffracted

C) are longitudinal waves

C) are longitudinal waves

D) have the same velocity

D) have the same velocity

#23. A liquid of mass 1.0 x 103kg fills a rectangular tank of length 2.5m and width 2.0m. If the tank is 4m high, what is the pressure at the middle of the tank?[g = 10ms-2]

A) 1.0 x 104Nm-2

A) 1.0 x 104Nm-2

B) 2.0 x 103Nm-2

B) 2.0 x 103Nm-2

C) 1.5 x 103Nm-2

C) 1.5 x 103Nm-2

D) 1.0 x 103Nm-2

D) 1.0 x 103Nm-2

#24. An empty 60 litre petrol tank has a mass of 10kg. Its mass when full of fuel of relative density 0.72 is

A) 7.2kg

A) 7.2kg

B) 33.2kg

B) 33.2kg

C) 43.2kg

C) 43.2kg

D) 53.2kg

D) 53.2kg

#25. Equal masses of copper and rubber are raised to the same temperature. After sometimes, the copper was observed to be at a lower temperature because

A) the specific heat capacity of copper is lower than that of rubber

A) the specific heat capacity of copper is lower than that of rubber

B) copper expands more than rubber

B) copper expands more than rubber

C) the specific heat capacity of rubber is lower than that of copper

C) the specific heat capacity of rubber is lower than that of copper

D) rubber expands more than copper

D) rubber expands more than copper

#26. An object of mass 100g projected vertically upwards from the ground level has a velocity of 20ms-1 at a height of 10m. calculate its initial kinetic energy at the ground level.[g = 10ms-2, neglect air resistance]

A) 10 J

A) 10 J

B) 20 J

B) 20 J

C) 30 J

C) 30 J

D) 50 J

D) 50 J

#27. An electric water pump rate 1.5 kW, lifts 200kg of water through a vertical height of 6 meters in seconds. What is the efficiency of the pump? [g = 10ms-2, neglecting air resistance]

A) 90.0%

A) 90.0%

B) 85.0%

B) 85.0%

C) 80.0%

C) 80.0%

D) 65.0%

D) 65.0%

#28. A cube of sides 0.1m hangs freely from a string. What is the upthrust on the cube when totally immersed in water? [density of water is 1000kgm-2, g = 10ms-2]

A) 1000 N

A) 1000 N

B) 700 N

B) 700 N

C) 110 N

C) 110 N

D) 10 N

D) 10 N

#29. A piece of wire gauze can be made to lie on water because

A) the wire guaze is less dense than water

A) the wire guaze is less dense than water

B) the water molecules repels the wire guaze upwards

B) the water molecules repels the wire guaze upwards

C) the water surface has the effect of an elastic thin skin

C) the water surface has the effect of an elastic thin skin

D) of the cohensive forces between the water and the wire guaze molecules

D) of the cohensive forces between the water and the wire guaze molecules

#30. An arrow of mass 0.1kg moving with a horizontal velocity of 15ms-1 is shot into a wooden block of mass 0.4kg lying at rest on a smooth horizontal surface. Their common velocity after impact is

A) 15.0 ms-1

A) 15.0 ms-1

B) 7.5 ms-1

B) 7.5 ms-1

C) 3.8 ms-1

C) 3.8 ms-1

D) 3.0 ms-1

D) 3.0 ms-1

#31. Two bodies X and Y are projected on the same horizontal plane, with the same initial speed but at angles 30 and 60 respectively to the horizontal. Neglecting air resistance, the ratio of the range of X to that of Y is

A) 1:1

A) 1:1

B) 1:2

B) 1:2

C) √3:1

C) √3:1

D) √3

D) √3

#32. Which of the following with respect to a body performing simple harmonic motion are in phase?

A) displacement and velocity of the body

A) displacement and velocity of the body

B) displacement and force on the body

B) displacement and force on the body

C) velocity and acceleration of the body

C) velocity and acceleration of the body

D) force acting on the body and the acceleration

D) force acting on the body and the acceleration

#33. 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]

A) 15N

A) 15N

B) 20N

B) 20N

C) 35N

C) 35N

D) 45N

D) 45N

#34. A planet has mass m1 and is at a distance r, from the sun. A second planet has mass m2 = 10m1 and at a distance of r2 = 2r1 from the sun. Determine the ratio of the gravitational force experienced by the planets

A) 1 : 5

A) 1 : 5

B) 2 : 5

B) 2 : 5

C) 3 : 5

C) 3 : 5

D) 4 : 5

D) 4 : 5

#35. At what respective values of X, Y and Z would the unit of force, the newton, be dimensionally equivalent to MxLyTz?

A) -1, 1, 2

A) -1, 1, 2

B) 1, 1, -2

B) 1, 1, -2

C) 1, -1, 2

C) 1, -1, 2

D) -1, 1, -2

D) -1, 1, -2

#36. The distance xm travelled by a particle in time t seconds is described by the equation x = 10 + 12t2, Find the average speed of the particle between the time interval t = 2s and t = 5s

A) 60 ms-1

A) 60 ms-1

B) 72 ms-1

B) 72 ms-1

C) 84 ms-1

C) 84 ms-1

D) 108 ms-1

D) 108 ms-1

#37. A 5kg block is released from rest on a smooth plane inclined at an angle of 30o to the horizontal. What is the acceleration down the plane? [g = 10ms-2]

A) 5.0 ms-2

A) 5.0 ms-2

B) 5.8 ms-2

B) 5.8 ms-2

C) 8.7 ms-2

C) 8.7 ms-2

D) 25.0 ms-2

D) 25.0 ms-2

#38. The invisible part of the spectrum of a white light consists of the following colors

A) Red, orange and yellow only

A) Red, orange and yellow only

B) Infra-red, ultraviolet and blue only

B) Infra-red, ultraviolet and blue only

C) Indigo and green only

C) Indigo and green only

D) Violet and red only

D) Violet and red only

E) Ultra violet and infra-red only

E) Ultra violet and infra-red only

#39. Which of the following is not true of the similarities between a camera and the human eye?

A) Both the camera and the human eye have light proof interiors

A) Both the camera and the human eye have light proof interiors

B) Both the camera and the human eye have light sensitive screens

B) Both the camera and the human eye have light sensitive screens

C) Inverted images are formed on the screen in both

C) Inverted images are formed on the screen in both

D) The distance between the lens and the screen is fixed in both

D) The distance between the lens and the screen is fixed in both

E) The amount of light entering both the eye and the camera can be adjusted

E) The amount of light entering both the eye and the camera can be adjusted

#40. The magnification produced with a converging lens is 5. If the object is a square wire gauze of side 2cm, calculate the area of the image

A) 100 cm3

A) 100 cm3

B) 40 cm3

B) 40 cm3

C) 20 cm3

C) 20 cm3

D) 10 cm3

D) 10 cm3

E) 4 cm3

E) 4 cm3

#41. The current in a series R-L-C circuit attains its maximum value when the

A) Impedance is greater than the capacitive reactance

A) Impedance is greater than the capacitive reactance

B) Inductive reactance is equal to the capacitive reactance

B) Inductive reactance is equal to the capacitive reactance

C) Inductive reactance is greater than the capacitive reactance

C) Inductive reactance is greater than the capacitive reactance

D) capacitive reactance is less than resistance

D) capacitive reactance is less than resistance

E) Inductive reactance is greater than the capacitive reactance

E) Inductive reactance is greater than the capacitive reactance

#42. When a resistor of resistance R is connected across a cell, the terminal p.d of the cell is reduced to three quarters of its e.m.f. The internal resistance of the cell is expressed as

A) R/4

A) R/4

B) R/3

B) R/3

C) R/2

C) R/2

D) 3R/4

D) 3R/4

E) 3R

E) 3R

#43. A pipe open at both ends, produces a fundamental note. If the velocity of sound in air is V and L the length of the pipe, which of the following expresses the frequency of the note? Neglect end correction

A) 2V/L

A) 2V/L

B) V/2L

B) V/2L

C) V/3L

C) V/3L

D) V/4L

D) V/4L

E) V/5L

E) V/5L

#44. Which of the following statements is not correct?

A) The pitch of a note depends on the frequency of the vibrating source

A) The pitch of a note depends on the frequency of the vibrating source

B) The loudness of a note depends on its intensity

B) The loudness of a note depends on its intensity

C) The velocity of sound in air does not depend on the intensity of the note producing it

C) The velocity of sound in air does not depend on the intensity of the note producing it

D) The overtones present in a note determine its quality

D) The overtones present in a note determine its quality

E) Wind speed effects on the speed of sound in air

E) Wind speed effects on the speed of sound in air

#45. A progressive wave has a wavelength of 50cm. calculate the phase difference between two points at a distance of 20cm apart.

A) 10/3π

A) 10/3π

B) 5/2 π

B) 5/2 π

C) 4/5 π

C) 4/5 π

D) 2/3 π

D) 2/3 π

E) π/3

E) π/3

#46. An alternating current with a peak value of 5A passes through a resistor of resistance 10Ω. Calculate the rate at which energy is dissipated in the resistor

A) 250W

A) 250W

B) 125W

B) 125W

C) 50W

C) 50W

D) 35.4W

D) 35.4W

E) 12.5W

E) 12.5W

#47. Lenz’s law of electromagnetic induction is essentially a statement of the

A) Inverse square law of gravitation

A) Inverse square law of gravitation

B) Inverse square law of magnetism

B) Inverse square law of magnetism

C) Inverse square law of electrostatics

C) Inverse square law of electrostatics

D) Law of conservation of momentum

D) Law of conservation of momentum

E) Law of conservation of energy

E) Law of conservation of energy

#48. The relationship between the directions of magnetic field, the current-carrying wire in the field is easily remembered using

A) Octet rule

A) Octet rule

B) Right hand grip rule

B) Right hand grip rule

C) Maxwell’s screw rule

C) Maxwell’s screw rule

D) Ampere’s swimming rule

D) Ampere’s swimming rule

E) Fleming’s left hand rule

E) Fleming’s left hand rule

#49. The current in the primary coil of a transformer is 2.5A. If the coil has 50 turns and the secondary250 turns, calculate the current in the secondary coil. Neglect energy losses in the transformer

A) 0.2A

A) 0.2A

B) 0.5A

B) 0.5A

C) 2.5A

C) 2.5A

D) 5A

D) 5A

E) 12.5A

E) 12.5A

#50. In a photocell, light energy is converted to

A) Electrical energy

A) Electrical energy

B) Chemical energy

B) Chemical energy

C) Heat energy

C) Heat energy

D) Mechanical energy

D) Mechanical energy

E) Kinetic energy

E) Kinetic energy

#51. Two identical waves traveling in the same direction are superimposed. What should be the phase difference between the waves for maximum destructive interference to occur?

A) 20°

A) 20°

B) 45°

B) 45°

C) 180°

C) 180°

D) 225°

D) 225°

E) 270°

E) 270°

#52. The ratio of tensile stress to tensile strain is known as

A) Modulus of integrity

A) Modulus of integrity

B) Modulus of elasticity

B) Modulus of elasticity

C) Shear modulus

C) Shear modulus

D) Bulk modulus

D) Bulk modulus

E) Young’s modulus

E) Young’s modulus

#53. Which of the following statements is not true of nuclear fission?

A) Mother nucleus is broken into two daughter nuclei of roughly equal parts

A) Mother nucleus is broken into two daughter nuclei of roughly equal parts

B) Neutron is normally used in bombarding heavy nucleus

B) Neutron is normally used in bombarding heavy nucleus

C) Two light nuclei are made to combine to form a heavy nucleus

C) Two light nuclei are made to combine to form a heavy nucleus

D) Very enormous energy is released

D) Very enormous energy is released

E) There is an apparent loss of mass

E) There is an apparent loss of mass

#54. When a paint brush is removed from clean water, the bristles of the brush are pulled together because of

A) The viscosity of the surrounding air

A) The viscosity of the surrounding air

B) The low density of water

B) The low density of water

C) Surface tension forces

C) Surface tension forces

D) The weight of the brush bristles

D) The weight of the brush bristles

E) The mass of the brush bristles

E) The mass of the brush bristles

#55. The odor of a leaking gas is perceived at a distance from the source. This is made possible by the process of

A) Sublimation

A) Sublimation

B) Diffusion

B) Diffusion

C) Osmosis

C) Osmosis

D) Evaporation

D) Evaporation

E) Capillarity

E) Capillarity

#56. Which of the following statements about kinetic theory of matter is not correct?

A) The molecules of matter are always in motion

A) The molecules of matter are always in motion

B) When a body is heated the average kinetic energy of its molecules decreases

B) When a body is heated the average kinetic energy of its molecules decreases

C) Molecules of a liquid move more freely than those of a solid

C) Molecules of a liquid move more freely than those of a solid

D) Matter is made up of very tiny particles called molecules

D) Matter is made up of very tiny particles called molecules

E) The molecules of a gas move more freely than those of a liquid

E) The molecules of a gas move more freely than those of a liquid

#57. Which of the following is not correct about the Rutherford’s model of an atom?

A) The mass of an atom is concentrated around the nucleus

A) The mass of an atom is concentrated around the nucleus

B) The nucleus of an atom is positively charged

B) The nucleus of an atom is positively charged

C) The nucleus is surrounded by the electron cloud

C) The nucleus is surrounded by the electron cloud

D) The model is applicable to atoms with only one electron in the outer shell

D) The model is applicable to atoms with only one electron in the outer shell

#58. At what distance from a simple microscope must an object be placed so that the image 5 times the size of the object is produced 20cm from the lens?

A) 2cm

A) 2cm

B) 3.3cm

B) 3.3cm

C) 4cm

C) 4cm

D) 5cm

D) 5cm

E) 15cm

E) 15cm

#59. Whenever light waves are restricted to a specific plane they are said to be

A) Diffracted

A) Diffracted

B) Refracted

B) Refracted

C) Diffused

C) Diffused

D) Regularly reflected

D) Regularly reflected

E) Plane polarized

E) Plane polarized

#60. Which of the following explains why a thick glass cup cracks when boiling water is poured into it?

A) Unequal expansion of the exterior and interior walls of the cup

A) Unequal expansion of the exterior and interior walls of the cup

B) Anomalous expansion of the water

B) Anomalous expansion of the water

C) Greater specific latent capacity of water compared with that of glass

C) Greater specific latent capacity of water compared with that of glass

D) Large increase in the heat capacity of the cup

D) Large increase in the heat capacity of the cup

E) High density of the water

E) High density of the water

#61. When white light is incident on a glass prism the spectrum produced on a screen placed beyond the prism is due to?

A) Diffraction

A) Diffraction

B) Reflection

B) Reflection

C) Refraction

C) Refraction

D) Polarisation

D) Polarisation

E) Interference

E) Interference

#62. Two blocks of the same dimension, one steel and the other wooden are dropped simultaneously from the same height. If they fall freely neglecting air resistance the

A) Two blocks hit the ground simultaneously because they have the same acceleration

A) Two blocks hit the ground simultaneously because they have the same acceleration

B) Two blocks reach the ground at the same time because their dimensions are the same

B) Two blocks reach the ground at the same time because their dimensions are the same

C) Wooden block being lighter than the steel block reaches the ground first

C) Wooden block being lighter than the steel block reaches the ground first

D) Steel block reaches the ground first because it is denser than the wooden block

D) Steel block reaches the ground first because it is denser than the wooden block

E) Steel block takes half as much time as the wooden block to reach the ground because it is more massive than the wooden block

E) Steel block takes half as much time as the wooden block to reach the ground because it is more massive than the wooden block

#63. Two forces 3N and 4N act on a body in directions due north and due east respectively. Calculate their equilibrant

A) 5N 53° east of North

A) 5N 53° east of North

B) 5N 53° west of the south

B) 5N 53° west of the south

C) 5N 37° north of east

C) 5N 37° north of east

D) 7N 37° west of North

D) 7N 37° west of North

E) 7N 37° south of west

E) 7N 37° south of west

#64. A capacitor of capacitance 25μF is connected to an a.c. power source of frequency 200 Hz. Calculate the reactance of the capacitor

A) 0.01

A) 0.01

B) 0.02

B) 0.02

C) 50.00

C) 50.00

D) 100.00

D) 100.00

E) 200.00.

E) 200.00.

#65. Which of the following is/are characteristics of sound? I Pitch II. Loudness III. Quality IV Noise

A) I only

A) I only

B) II only

B) II only

C) I and II only

C) I and II only

D) l, II and III only

D) l, II and III only

E) I, II, III and IV

E) I, II, III and IV

Finish

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