JAMB Physics 2004 test

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JAMB Physics 2004

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1 / 44

Given three capacitors 0.3μF, 0.5μF and
0.2μF, the joined capacitance when
arranged to give minimum capacitance
is

2 / 44

Fluorescent tubes produce light by the

3 / 44

A machine whose efficiency is 60% has
a velocity ratio of 5. If a force of 500N is
applied to lift a load P, what is the
magnitude of P?

4 / 44

Calculate the angle of minimum
deviation for a ray which is refracted
through an equiangular prism of
refractive index 1.4.

5 / 44

When left in a freezer, a bottle full of
water cracks on freezing into ice
because of the

6 / 44

Transverse waves can be distinguished
from longitudinal waves using the
characteristic of

7 / 44

Tea pots are often silver-coated to
prevent heat loss by

8 / 44

Electrical appliances in homes are
normally earthed so that

9 / 44

In a hydraulic press, a force of 40N is
applied on the effort piston of area
0.4m2
. If the force exerted on the load
piston is 400N, the area of the large
piston is

10 / 44

As the pressure of a fluid increases, its
viscosity

11 / 44

The energy stored in an inductor of
inductance 5mH when a current of 6A
flows through it is

12 / 44

The change in volume when 450kg of
ice is completely melted is

13 / 44

A person can focus an object only when
it lies within 200cm from him. Which
spectacles should be used to increase
his maximum distance of distinct vision
to infinity?

14 / 44

In a reversed biased junction diode,
current flows in by

15 / 44

The earth is four times the size of the
moon and the acceleration due to
gravity on the earth is 80 times that on
the moon. The ratio of the mass of the
moon to that of the earth is

16 / 44

The difference between X-rays and
gamma rays is that

17 / 44

The pitch of a sound note depends on

18 / 44

A cell whose internal resistance is 0.5Ω
delivers a current of 4A to an external
resistor. The lost voltage of the cell is

19 / 44

The diagram above shows forces 4N,
6N, 10N and 8N which act at a point O
in the directions indicated. The net
horizontal force is

20 / 44

Which types of mirrors are capable of
producing parallel beams of light such
as those arising from the headlamps of
a car?

21 / 44

A man exerts a pressure of 2.8 x 103
Nm-2
on the ground and has 4 x 10-2m
2
of his feet in contact with the ground.
The weight of the man is

22 / 44

For semi-conductors to have negative
temperature coefficient of resistance
implies that

23 / 44

If 16mA of current flows through a
conductor in one second, the number of
electrons transported per second is

24 / 44

A steady current of 2A flows in a coil of
emf 12V for 0.4s. A back emf of 3V was
induced during this period. The stored
energy in the loop that can be utilized is

25 / 44

Wavelength
II. Medium of propagation
III. Wave velocity
IV. Frequency.
V. Energy.
Which of the above are used for
characterizing waves?

26 / 44

A radioisotope has a decay constant of
10-7
s
-1
. The average life of the
radioisotope is

27 / 44

In the diagram above, the ratio of the
electric power dissipated in the 6Ω and
3Ω resistors respectively is

28 / 44

The instrument used for securing a
large number of similar charges by
induction is called

29 / 44

Metal rods of length 20m each are laid
end to end to form a bridge at 25o
C.
What gap will be provided between
consecutive rails for the bridge to
withstand 75o
C?

30 / 44

A ray of light makes an angle of 35o with
a plane mirror. What is the angle of
reflection?

31 / 44

X-rays can be used in the study of
crystal structures because they

32 / 44

Which of the following is an electrolyte?

33 / 44

A 50W electric heater is used to heat a
metal block of mass 5kg. If in 10
minutes, a temperature rise of 12o
C is
achieved, the specific heat capacity of
the metal is

34 / 44

A moving coil galvanometer has a full-
scale deflection of 3A equivalent to 30o

deflection. The sensitivity of the
instrument is

35 / 44

What happens to the rays in a parallel
beam of light?

36 / 44

A 100kg box is pushed along a road with
a force of 500N. If the box moves with a
uniform velocity, the coefficient of
friction between the box and the road is

37 / 44

A body of mass 4kg is acted on by a
constant force of 12N for 3 seconds.
The kinetic energy gained by the body
at the end of the time is

38 / 44

I. Jet-propelled aircraft
II. Rocket propulsion
III. The recoil of a gun
IV. A person walking.
Which of the above is based on
Newton’s third law of motion?

39 / 44

A generator-manufacturing company
was contracted to produce an a.c.
dynamo but inadvertently produced a
d.c. dynamo. To correct this error, the

40 / 44

The binding energy of helium He is

41 / 44

If the angle between two vectors P and
Q is 0o
, the vectors are said to

42 / 44

In which of the following material
media would sound travel faster?

43 / 44

An a.c. circuit of e.m.f. 12V has a
resistor of resistance 8Ω connected in
series to an inductor of inductive
reactance 16Ω and a capacitor of capacitive reactance 10Ω. The current
flowing in the circuit is

44 / 44

To protect a material from the influence
of an external magnetic field, the
material should be kept in a

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