Physics Past Questions v10 For (JAMB/WAEC/NECO); These Physics past questions are for students who are sitting for the following examinations

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#1. Fig 1 is a graph of force against extension for a spiral spring, the force constant of the spring is given by the

A) slope of the linear prtion of the graph

A) slope of the linear prtion of the graph

B) length of the linear portion of the graph

B) length of the linear portion of the graph

C) area under the linear portion of the graph

C) area under the linear portion of the graph

D) area under the entire graph

D) area under the entire graph

#2. In fig 6, a ray of light in air strikes a glass plate at an angle of incidence 60 degrees, the reflected ray is observed to be perpendicular to the refracted ray, what is the refractive index of the glass

A) 1.73

A) 1.73

B) 1.50

B) 1.50

C) 0.87

C) 0.87

D) 0.57

D) 0.57

#3. In an experiment in which molten naphthalene is allowed to cool, the cooling curve in fig 5 was obtained, the temperature is known as

A) cooling temperature

A) cooling temperature

B) boiling point

B) boiling point

C) melting point

C) melting point

D) vaporization point

D) vaporization point

#4. Fig 4 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 system is 40% then the value of W is

A) 28.0N

A) 28.0N

B) 48.0N

B) 48.0N

C) 50.0N

C) 50.0N

D) 288.0N

D) 288.0N

#5. In fig 3, three forces F1, F2, and F3 acting at O are in equilibrium. If the magnitude of F1 is 10N,and the magnitude of F2 is 5N, find the magnitude of F3

A) 26.4N

A) 26.4N

B) 15.0N

B) 15.0N

C) 13.2N

C) 13.2N

D) 10.0N

D) 10.0N

#6. A uniform meter rule QR is balanced on a knife edge which is 55cm from R, when a mass of 10g is hung at P as shown above, the mass of the meter rule is (Note that QP is 10cm)

A) 550g

A) 550g

B) 350g

B) 350g

C) 70g

C) 70g

D) 35g

D) 35g

#7. In fig 9 the value of R is

A) 3Ω

A) 3Ω

B) 4Ω

B) 4Ω

C) 5Ω

C) 5Ω

D) 6Ω

D) 6Ω

#8. If the fig above E is an accumulator with negligible internal resistance. and the EMF 9.0V, The the total current is

A) 0.3A

A) 0.3A

B) 0.8A

B) 0.8A

C) 1.0A

C) 1.0A

D) 1.8A

D) 1.8A

#9. Which of the following is true of magnetism?

A) Iron fillings cling mainly round the ends of a bar magnet

A) Iron fillings cling mainly round the ends of a bar magnet

B) The freely suspended bar magnet comes to rest in the geographic north-south direction

B) The freely suspended bar magnet comes to rest in the geographic north-south direction

C) Like poles attract

C) Like poles attract

D) Iodestone is a non-magnetic oxide

D) Iodestone is a non-magnetic oxide

#10. The angle between the magnetic meridian and the geographic meridian at a locality on the earth is the

A) longitude of the locality

A) longitude of the locality

B) angle of inclination at the locality

B) angle of inclination at the locality

C) latitude of the locality

C) latitude of the locality

D) angle of declination of the locality

D) angle of declination of the locality

#11. The sign of the change on a charged glass rod may be determined with

A) a charged electroscope

A) a charged electroscope

B) an uncharged electroscope

B) an uncharged electroscope

C) a galvanometer

C) a galvanometer

D) an electrometer

D) an electrometer

#12. If the inclination at Ibadan is 7oS, this means that

A) the angle between the geographic meridian and the magnetic meridian at Ibadan is 7o

A) the angle between the geographic meridian and the magnetic meridian at Ibadan is 7o

B) the earth's magnetic intensity at Ibamakes angle 7o with the horidan zontal direction

B) the earth's magnetic intensity at Ibamakes angle 7o with the horidan zontal direction

C) a magnetic needle will be inclined at 7o to the vertical at Ibadan

C) a magnetic needle will be inclined at 7o to the vertical at Ibadan

D) the north pole of a magnetic needle dips downward at Ibadan

D) the north pole of a magnetic needle dips downward at Ibadan

#13. The wavelength of ultraviolet radiation is 400nm. If the speed of light in air is 3 x 108ms-1, then the frequency of the ultraviolet radiation is

A) 1.3 x 1015Hz

A) 1.3 x 1015Hz

B) 7.5 x 105Hz

B) 7.5 x 105Hz

C) 1.2 x 1011Hz

C) 1.2 x 1011Hz

D) 7.5 x 1014Hz

D) 7.5 x 1014Hz

#14. A man clapping his hands at regular intervals observes that the echo of a clap coincides with the next clap. If the reflecting cliff is 160m away and the speed of sound is 320ms-1, what is the frequency of the clapping?

A) 1 Hz

A) 1 Hz

B) 2Hz

B) 2Hz

C) 4Hz

C) 4Hz

D) 8Hz

D) 8Hz

#15. The vibration of an air column produces the sound in the

A) piano

A) piano

B) guiter

B) guiter

C) flute

C) flute

D) school handbell

D) school handbell

#16. Which of the following is NOT a part of a d.c. electric motor?

A) Field-magnet

A) Field-magnet

B) Armature

B) Armature

C) Commutator

C) Commutator

D) Transformer

D) Transformer

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

A) Electrical power

A) Electrical power

B) Kinetic energy

B) Kinetic energy

C) Electric current

C) Electric current

D) Chemical energy

D) Chemical energy

#18. A dentist obtains a linear magnification of 4 of a hole in a tooth by placing a concave mirror at a distance, of 2.0cm from the tooth. The radius of Curvature of the mirror is

A) 5.3cm

A) 5.3cm

B) 3.2cm

B) 3.2cm

C) 2.7cm

C) 2.7cm

D) 1.6cm

D) 1.6cm

#19. A pencil is placed vertically between a concave mirror and its focal point. The image of the pencil in the mirror will be

A) real, inverted and diminished

A) real, inverted and diminished

B) virtual, inverted and enlarged

B) virtual, inverted and enlarged

C) real, erect and enlarged

C) real, erect and enlarged

D) virtual, erect and enlarged

D) virtual, erect and enlarged

#20. A wave of frequency 10Hz forms a stationary wave pattern in a medium where the velocity is 20cms-1. The distance between adjacent nodes is

A) 1.0cm

A) 1.0cm

B) 1.5cm

B) 1.5cm

C) 2.0cm

C) 2.0cm

D) 5.0cm

D) 5.0cm

#21. A gas occupies a volume of 300cm3at a temperature of 27oC. What is its volume at 54oC, when the pressure is constant?

A) 150cm3

A) 150cm3

B) 273cm3

B) 273cm3

C) 327cm3

C) 327cm3

D) 600cm3

D) 600cm3

#22. When two objects P and Q are supplied with the same quantity of heat, the temperature change in P is observed to be twice that of Q. The ratio of the specific heat capacity of P to Q is

A) 1 : 4

A) 1 : 4

B) 4 : 1

B) 4 : 1

C) 1 : 1

C) 1 : 1

D) 2 : 1

D) 2 : 1

#23. Which of the following is true of sounds?

A ) sound travels faster in air at 20oC than at 30oC

A ) sound travels faster in air at 20oC than at 30oC

B) the frequency of a given sound wave changes when it crosses the boundary seperating two media

B) the frequency of a given sound wave changes when it crosses the boundary seperating two media

C) the wavelength of a given sound wave in air decreases as the temperature increases

C) the wavelength of a given sound wave in air decreases as the temperature increases

D) sound waves cannot be reflected

D) sound waves cannot be reflected

#24. A lens of focal length 12.0cm forms an upright image three times the size of a real object. The distance between the object and the images is

A) 8.0cm

A) 8.0cm

B) 16.0cm

B) 16.0cm

C) 24.0cm

C) 24.0cm

D) 32.0cm

D) 32.0cm

#25. In which of the following arrangements is the wavelength in an increasing order?

A) Gamma rays, infra-red rays, x-rays, radiowaves

A) Gamma rays, infra-red rays, x-rays, radiowaves

B) Gamma rays, x-rays, infra-red ray, radiowaves

B) Gamma rays, x-rays, infra-red ray, radiowaves

C) Radiowaves, x-rays, gamma ray, infra-red rays

C) Radiowaves, x-rays, gamma ray, infra-red rays

D) Infra-red rays, radiowaves, x-rays, gamma rays

D) Infra-red rays, radiowaves, x-rays, gamma rays

#26. The expansion of solids can be considered a disadvantage in the

A) balance wheel of a watch

A) balance wheel of a watch

B) fitting of wheels on rims

B) fitting of wheels on rims

C) fire alarm

C) fire alarm

D) thermostat

D) thermostat

#27. The specific latent heat of fusion of lead is the amount of heat required to

A) melt lead at its melting point

A) melt lead at its melting point

B) heat a unit mass of lead through 1oC

B) heat a unit mass of lead through 1oC

C) change the state of a unit mass of lead at its melting point

C) change the state of a unit mass of lead at its melting point

D) change the state of a unit mass of lead at its boiling point

D) change the state of a unit mass of lead at its boiling point

#28. Which of the following is common to evaporation and boiling? They

A) take place at any temperature B)

A) take place at any temperature B)

B) are surface phenomena

B) are surface phenomena

C) involve change of state

C) involve change of state

D) take place at a definite pressure

D) take place at a definite pressure

#29. Mercury is suitable as a barometric fluid because it

A) expands uniformly ue

A) expands uniformly ue

B) is opaque

B) is opaque

C) is several times denser than water

C) is several times denser than water

D) is a good conductor of heat

D) is a good conductor of heat

#30. Which of the following properties makes metals ideal for cooking utensils?

A) high coefficient of expansion

A) high coefficient of expansion

B) good conduction of heat

B) good conduction of heat

C) low specific heat capacity

C) low specific heat capacity

D) poor radiation of heat

D) poor radiation of heat

#31. Which of the following assumptions is made in a simple pendulum experiment? the

A) suspending string is inextensible

A) suspending string is inextensible

B) bob has a finite size

B) bob has a finite size

C) bob has a definite mass

C) bob has a definite mass

D) initial angle of oscillation must be large

D) initial angle of oscillation must be large

#32. A constant force of magnitude F acts on an object of mass 0.04kg initially at rest at a point O. if the speed of the object when it has moved 50m from O is 500ms-1, what is the value of F?

A) 0.4N

A) 0.4N

B) 100.0N

B) 100.0N

C) 250.0N

C) 250.0N

D) 1000.0N

D) 1000.0N

#33. A rectangular tank contains water to a depth of 2m, if the base is 4m x 3m, calculate the force on the base (Density of water = 103kgm-3, g = 10ms-2)

A) 1.4 x 102N

A) 1.4 x 102N

B) 24 x 104N

B) 24 x 104N

C) 2.0 x 104N

C) 2.0 x 104N

D) 1.7 x 103N

D) 1.7 x 103N

#34. A 1000kg elevator is descending vertically with an acceleration of 1.0ms-2, if the acceleration due to gravity is 10ms-2, the tension in the suspending cable is

A) 1.0N

A) 1.0N

B) 10.0N

B) 10.0N

C) 9000.0N

C) 9000.0N

D) 11000N

D) 11000N

#35. The mode of heat transfer which does not require a material medium is

A) conduction

A) conduction

B) radiation

B) radiation

C) convection

C) convection

D) propagation

D) propagation

#36. A heavy object is suspended from a string and lowered into water so that it is completely submerged. The object appears lighter because

A) the density of water is less than that of the object

A) the density of water is less than that of the object

B) the pressure is low just below the water surface

B) the pressure is low just below the water surface

C) it experiences an upthrust

C) it experiences an upthrust

D) the tension in the string neutralizes part of the weight

D) the tension in the string neutralizes part of the weight

#37. Which of the following is a derived unit?

A) Kilogramme

A) Kilogramme

B) Meter

B) Meter

C) Kelvin

C) Kelvin

D) Newton

D) Newton

#38. Two objects, one having three times the mass of the other, are dropped at the same time from a tall building. When they are above the ground, the two objects will have the same

A) Momentum

A) Momentum

B) Kinetic energy

B) Kinetic energy

C) Potential energy

C) Potential energy

D) Acceleration

D) Acceleration

#39. Which of the following is in a neutral equilibrium?

A) a heavy weight suspended on a string

A) a heavy weight suspended on a string

B) a cone resting on its slant edge

B) a cone resting on its slant edge

C) a heavy-based table lamp

C) a heavy-based table lamp

D) the beam of a balance in use

D) the beam of a balance in use

#40. Which of the following represents the correct precision if the length of a piece of wire is measured with a meter rule?

A) 35mm

A) 35mm

B) 35.0mm

B) 35.0mm

C) 35.00mm

C) 35.00mm

D) 35.01mm

D) 35.01mm

#41. In an experiment in which a molten substance is allowed to cool, the cooling curve above was obtained. The temperature 60oC is known as the

A) vaporization point

A) vaporization point

B) cooling temperature

B) cooling temperature

C) boiling point

C) boiling point

D) melting point

D) melting point

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