JAMB Physics 2003

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JAMB Physics 2003

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1 / 64

On a fairly cool rainy day when the
temperature is 20o

C, the length of a
steel railroad track is 20cm. What will

be its length on a hot dry day when the
temperature is 40o
C?

2 / 64

At what position will an object be
placed in front of a concave mirror in
order in order to obtain an image at
infinity?

3 / 64

An open pipe closed at one end
produces its first fundamental note. If
the velocity of sound in air is v and l the
length of the pipe, the frequency of the
note is

4 / 64

Which of the following pairs of light rays
shows the widest separation in the
spectrum of white light?

5 / 64

A ray incident on a glass prism
undergoes minimum deviation when
the

6 / 64

The most suitable cell used for short
interval switches in electric bells is a

7 / 64

The force on a charge moving with
velocity v in a magnetic field B is half of
the momentum force when the angle
between v and B is

8 / 64

I. It retains its magnetism much longer
than steel.
II. It is more easily magnetized than
steel.
III. It is more easily demagnetized than
steel.
IV. It produces a stronger magnet than
steel.
Which combination of the above makes
iron preferable to steel in the making of
electromagnets?

9 / 64

In a semi-conductor junction diode, as

the depletion or barrier layer is forward-
biased, the layer

10 / 64

In the calibration of an ammeter using
Faraday’s law of electrolysis, the
ammeter reading is kept constant at
1.20A. If 0.990g of copper is deposited
in 40 minutes, the correction to be
applied to the ammeter is

11 / 64

A 2000W electric heater is used to heat
a metal object of mass 5kg initially at
10o
C. If a temperature rise of 30o
C is
obtained after 10 min, the heat capacity
of the material is

12 / 64

The operation of an optical fibre is
based on the principle of

13 / 64

I. It retains its magnetism much longer
than steel.
II. It is more easily magnetized than
steel.
III. It is more easily demagnetized than
steel.
IV. It produces a stronger magnet than
steel.
Which combination of the above makes
iron preferable to steel in the making of
electromagnets?

14 / 64

A ray incident on a glass prism
undergoes minimum deviation when
the

15 / 64

On top of a spiral spring of force
constant 500Nm-1

is placed a mass of 5

x 10-3
kg. If the spring is compressed
downwards by a length of 0.02m and
then released, calculate the height to
which the mass is projected.

16 / 64

A positively charged rod X is brought
near an uncharged metal sphere Y and
is then touched by a finger with X still in
place. When the finger is removed, the
result is that Y has

17 / 64

A magnetic field is said to exist at a
point if a force is

18 / 64

In a fission process, the decrease in
mass is 0.01%. How much energy
could be obtained from the fission of
1.0g of the material?

19 / 64

By what factor will the size of an object
placed 10cm from a convex lens be
increased if the image is seen on a
screen placed 25cm from the lens?

20 / 64

If the uncertainty in the measurement
of the position of a particle is 5 x 10-10m,
the uncertainty in the momentum of
the particle is

21 / 64

When a nucleus is formed by bringing
protons and neutrons together, the
actual mass of the formed nucleus is
less than the sum of the masses of the
constituent protons and neutrons. The
energy equivalent of this mass
difference is the

22 / 64

Which of the following pairs of light rays
shows the widest separation in the
spectrum of white light?

23 / 64

In the diagram above, if each of the
resistors can dissipate a maximum of
18W without becoming excessively
heated, what is the maximum power
the circuit can dissipate?

24 / 64

A satellite is in a parking orbit if its
period is

25 / 64

When an alternating current given by
I = 10sin(120π)t passes through a 12Ω
resistor, the power dissipated in the
resistor is

26 / 64

If the uncertainty in the measurement
of the position of a particle is 5 x 10-10m,
the uncertainty in the momentum of
the particle is

27 / 64

The phenomenon whereby the water
droplets in the atmosphere combine
with dust particles in the air to reduce
visibility is

28 / 64

Thermal equilibrium between two
objects exists when

29 / 64

The count rate of a radioactive material
is 800 count/min. If the half-life of the
material is 4 days, what would be the
count rate 16 days later?

30 / 64

In the diagram above, what would
happen to the current, I, if another
resistor, R2, is connected in parallel to
R1?

31 / 64

A wire of 5Ω resistance is drawn out so
that its new length is two times the
original length. If the resistivity of the

wire remains the same and the cross-
sectional area is halved, the new

resistance is

32 / 64

When a nucleus is formed by bringing
protons and neutrons together, the
actual mass of the formed nucleus is
less than the sum of the masses of the
constituent protons and neutrons. The
energy equivalent of this mass
difference is the

33 / 64

The most suitable cell used for short
interval switches in electric bells is a

34 / 64

A bead traveling on a straight wire is
brought to rest at 0.2m by friction. If
the mass of the bead is 0.01kg and the
coefficient of friction between the bead
and the wire is 0.1, determine the
workdone by the friction.

35 / 64

Given that Young’s modulus for
aluminium is 7.0 x 1010 Nm-2

and density

is 2.7 x 103
kgm-3
, find the speed of the
sound produced if a solid bar is struck at
one end with a hammer.

36 / 64

In a fission process, the decrease in
mass is 0.01%. How much energy
could be obtained from the fission of
1.0g of the material?

37 / 64

A force of 100N is used to kick a football
of mass 0.8kg. Find the velocity with
which the ball moves if it takes 0.8s to
be kicked.

38 / 64

The maximum kinetic energy of the
photoelectrons emitted from a metal
surface is 0.34eV. If the work function
of the metal surface is 1.83eV, , find
the stopping potential.

39 / 64

If 1.2 x 106 J of heat energy is given off
in 1 sec from a vessel maintained at a

the temperature gradient of 30Km-1
, the

surface area of the vessel is

40 / 64

A hose of cross-sectional area 0.5m2
is
used to discharge water from a water
tanker at a velocity of 60ms-1

in 20s into
a container. If the container is filled
completely, the volume of the container
is

41 / 64

The length of a piece of glass block was
measured by means of a vernier caliper
as shown above. The length of the glass
block is

42 / 64

A circuit has an area of 0.4m2
and
consists of 50 loops of wire. If the loops
are twisted and allowed to rotate at a
constant angular velocity of 10 rad s-1
in
a uniform magnetic field of 0.4T, the
amplitude of the induced voltage is

43 / 64

If an object is placed between two
parallel plane mirrors with their
reflecting surfaces facing each other,
how many images of the object will be
formed?

44 / 64

The table above shows the saturation
vapour pressure against temperature in
a certain town. If the vapour pressure in
this town at 20o

C is 10 mmHg, what is

the relative humidity?

45 / 64

A circuit has an area of 0.4m2
and
consists of 50 loops of wire. If the loops
are twisted and allowed to rotate at a
constant angular velocity of 10 rad s-1
in
a uniform magnetic field of 0.4T, the
amplitude of the induced voltage is

46 / 64

An electron makes a transition from a
certain energy level Ek to the ground
state Eo. If the frequency of emission is
8.0 x 1014Hz, the energy emitted is

47 / 64

A magnetic field is said to exist at a
point if a force is

48 / 64

When an alternating current given by
I = 10sin(120π)t passes through a 12Ω
resistor, the power dissipated in the
resistor is

49 / 64

The force on a charge moving with
velocity v in a magnetic field B is half of
the momentum force when the angle
between v and B is

50 / 64

In a semi-conductor junction diode, as

the depletion or barrier layer is forward-
biased, the layer

51 / 64

Water does not drop through an open
umbrella of silk material unless the
inside of the umbrella is touched. This is
due to

52 / 64

An electron of charge 1.6 x 10-19C is
accelerated between two metal plates.
If the kinetic energy of the electron is
4.8 x 10-17J, the potential difference
between the plates is

53 / 64

The major difference between a pure
semi-conductor and a pure metal is that

54 / 64

A ray of light is incident on an
equilateral triangular prism of refractive
index
2
3
. Calculate the angle through
which the ray is minimally deviated in
the prism.

55 / 64

If the distance from a point source of
sound is doubled, by what factor does
the intensity decrease?

56 / 64

An electron of charge 1.6 x 10-19C is
accelerated between two metal plates.
If the kinetic energy of the electron is
4.8 x 10-17J, the potential difference
between the plates is

57 / 64

In the calibration of an ammeter using
Faraday’s law of electrolysis, the
ammeter reading is kept constant at
1.20A. If 0.990g of copper is deposited
in 40 minutes, the correction to be
applied to the ammeter is

58 / 64

The major difference between a pure
semi-conductor and a pure metal is that

59 / 64

A 90cm uniform lever has a load of 30N
suspended at 15cm from one of its
ends. If the fulcrum is at the centre of
gravity, the force that must be applied
at its other end to keep it in horizontal
equilibrium is

60 / 64

A test tube of radius 1.0cm is loaded to
8.8g. If it is placed upright in water, find
the depth to which it would sink.

61 / 64

A tuning fork of frequency 340 Hz is
vibrated just above a cylindrical tube of
height 1.2m. If water is slowly poured
into the tube, at what maximum height
will resonance occur?

62 / 64

An electron makes a transition from a
certain energy level Ek to the ground
state Eo. If the frequency of emission is
8.0 x 1014Hz, the energy emitted is

63 / 64

The maximum kinetic energy of the
photoelectrons emitted from a metal
surface is 0.34eV. If the work function
of the metal surface is 1.83eV, , find
the stopping potential.

64 / 64

The count rate of a radioactive material
is 800 count/min. If the half-life of the
material is 4 days, what would be the
count rate 16 days later?

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