Physics Past Questions

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46 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10
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Past Questions

46 questions
Question 1 of 20 46 total questions
Question 11
jamb 1986

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

A1.0cm
B1.5cm
C2.0cm
D5.0cm
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Question 12
jamb 1986

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

Areal, inverted and diminished
Bvirtual, inverted and enlarged
Creal, erect and enlarged
Dvirtual, erect and enlarged
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Question 13
jamb 1986
What is the effect of the increase in the size of the hole of a pin-hole camera on the image? it
Agives a blurred image
Bcorrects for chromatic aberration
Cmagnifies the image
Dbrings the image into a sharper focus
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Question 14
jamb 1986
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
A5.3cm
B3.2cm
C2.7cm
D1.6cm
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Question 15
jamb 1986
If the refractive index of glass is 1.5, what is the critical angle at the air-glass interface?
Asin-1\(\frac{1}{2}\)
Bsin-1\(\frac{2}{3}\)
Csin-1\(\frac{3}{4}\)
Dsin-1\(\frac{8}{9}\)
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Question 16
jamb 1986
In which of the following arrangements is the wavelength in an increasing order?
AGamma rays, infra-red rays, x-rays, radiowaves
BGamma rays, x-rays, infra-red ray, radiowaves
CRadiowaves, x-rays, gamma ray, infra-red rays
DInfra-red rays, radiowaves, x-rays, gamma rays
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Question 17
jamb 1986

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

A8.0cm
B16.0cm
C24.0cm
D32.0cm
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Question 18
jamb 1986
Which of the following is true of sounds?
Asound travels faster in air at 20oC than at 30oC
Bthe frequency of a given sound wave changes when it crosses the boundary seperating two media
Cthe wavelength of a given sound wave in air decreases as the temperature increases
Dsound waves cannot be reflected
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Question 19
jamb 1986

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 mass of P is half that of Q. The ratio of the specific heat capacity of P to Q is

A1 : 4
B4 : 1
C1 : 1
D2 : 1
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Question 20
jamb 1986
A gas occupies a volume of 300cm3at a temperature of 27oC. What is its volume at 54oC, when the pressure is constant?
A150cm3
B273cm3
C327cm3
D600cm3
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Question 21
jamb 1986
Which of the following properties makes metals ideal for cooking utensils?
Ahigh coefficient of expansion
Bgood conduction of heat
Clow specific heat capacity
Dpoor radiation of heat
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Question 22
jamb 1986

Mercury is suitable as a barometric fluid because it?

Aexpands uniformly
Bis opaque
Cis several times denser than water
Dis a good conductor of heat
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Question 23
jamb 1986
Which of the following is common to evaporation and boiling? They
Atake place at any temperature
Bare surface phenomena
Cinvolve change of state
Dtake place at a definite pressure
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Question 24
jamb 1986

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

Amelt lead at its melting point
Bheat a unit mass of lead through 1oC
Cchange the state of a unit mass of lead at its melting point
Dchange the state of a unit mass of lead at its boiling point
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Question 25
jamb 1986

The expansion of solids can be considered a disadvantage in the?

Abalance wheel of a watch
Bfitting of wheels on rims
Cfire alarm
Dthermostat
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Question 26
jamb 1986
The mode of heat transfer which does not require a material medium is
Aconduction
Bradiation
Cconvection
Dpropagation
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Question 27
jamb 1986

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

A1.0N
B10.0N
C9000.0N
D11 000N
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Question 28
jamb 1986
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)
A1.4 x 102N
B24 x 104N
C2.0 x 104N
D1.7 x 103N
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Question 29
jamb 1986
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?
A0.4N
B100.0N
C250.0N
D1000.0N
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Question 30
jamb 1986
Which of the following assumptions is made in a simple pendulum experiment? the
Asuspending string is inextensible
Bbob has a finite size
Cbob has a definite mass
Dinitial angle of oscillation must be large
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