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Physics NECO SSCE 2003 Current Electricity & Electric Circuits
A ball of mass m moving at velocity u collides with another ball of equal mass at rest. If the two balls move off together after the impact, calculate their common velocity.
A
\(\frac{u}{v}\)
B
\(\frac{u}{2}\)
C
u
D
2u
E
\(\frac{u}{m}\)
medium Difficulty
Physics NECO SSCE 2003 Temperature, Thermometry & Thermal Expansion
Which of the following statement(s) is/are correct? I. When a liquid expands its density falls II. When a mercury-in-glass thermometer is placed in a hot liquid, the mercury level first descends and then rises. III. The apparent expansion of a liquid is greater than its real expansion.
A
I only
B
II only
C
III only
D
I and II only
E
II and III only
medium Difficulty
Physics NECO SSCE 2003 Current Electricity & Electric Circuits
Which of the following statement(s) is/are correct about the isotopes of an elements? They have the same I. chemical properties II. nucleon number III proton number
A
I only
B
II only
C
I and II only
D
I and III only
E
I,II and III
medium Difficulty
Physics NECO SSCE 2003 Magnetism, Electromagnetism & AC Circuits
Lenz’s law of electromagnetic induction states that
A
a force is exerted on a current carrying conductor in a magnetic field
B
the induced current in a conductor is in such a direction as to oppose the change producing it
C
the magnitude of the induced electromotive force in a circuit is proportional to the rate of change of the number of lines of force linking the circuit
D
the magnitude of the induced electromotive force is proportional to the current producing the magnetic flux
E
whenever there is a change in the magnetic flux linked with the circuit, an electromotive is induced
medium Difficulty
Physics NECO SSCE 2003 Reflection, Refraction & Dispersion of Light
An object is placed 30 cm in front of a concave mirror of focal length 20cm. Calculate the distance between the object and the image.
A
90cm
B
40cm
C
30cm
D
20cm
E
10cm
medium Difficulty
Physics NECO SSCE 2003 Waves, Sound & Vibrations
Which of the following properties is NOT exhibited by sound waves?
A
Diffraction
B
interference
C
Polarisation
D
Reflection
E
Refraction
medium Difficulty
Physics NECO SSCE 2003 Waves, Sound & Vibrations
An evidence of the wave nature of matter is
A
Browniam motion
B
Compton effect
C
diffraction
D
diffusion
E
photo electricity
medium Difficulty
Physics NECO SSCE 2003 Atomic, Quantum, Nuclear Physics & Electronics
J.J. Thomson’s model of the atom was abandoned because
A
it could not explain the scattering of alpha particles
B
it did not account for the neutron
C
it did not account for the size of the atom
D
it was known as plum-pudding model
E
the model was not similar to any observable phenomena
medium Difficulty
Physics NECO SSCE 2003 Current Electricity & Electric Circuits
Water in an open container boils at a lower temperature when heated at the top of a mountain than at sea-level because at the top of a mountain
A
pressure is increased
B
pressure is reduced
C
the rays of the sun add more heat to the water
D
the saturation vapour pressure of water is higher than at sea-level
E
the temperature is lower than at sea-level
medium Difficulty
Physics NECO SSCE 2003 Current Electricity & Electric Circuits
The volume of a given mass of gas is 40cm3 at 27° C. What is its volume at 90° C if its pressure remains constant?
A
32.84cm3
B
40.02cm3
C
48.40cm3
D
57.44cm3
E
72.84cm3
medium Difficulty
Physics NECO SSCE 2003 Current Electricity & Electric Circuits
Which of the following statements is NOT true?
A
A lead-acid accumulator can deliver a large current because of its very large internal resistance.
B
A secondary cell can be recharged.
C
As a lead-acid accumulator is being charged, the density of the acid in it increases.
D
The chemical action in a primary cell is irreversible.
E
The conventional current in a circuit rlows from the positive to the negative terminal of the battery.
medium Difficulty
Physics NECO SSCE 2003 Reflection, Refraction & Dispersion of Light
A sheet of white paper viewed through blue glass appears blue because
A
blue is a primary colour
B
the glass absorbs all colours except the blue colour
C
the glass reflects blue colour
D
the paper reflects blue colour only
E
white light is easily absorbed by the glass
medium Difficulty
Physics NECO SSCE 2003 Reflection, Refraction & Dispersion of Light
A sheet of white paper viewed through blue glass appears blue because
A
blue is a primary colour
B
the glass absorbs all colours except the blue colour
C
the glass reflects blue colour
D
the paper reflects blue colour only
E
white light is easily absorbed by the glass
medium Difficulty
Physics WAEC / WASSCE 2003 Linear Motion, Projectiles & Kinematics
(a) State two objects each used in sports and warfare which may be considered as projectiles. (b) the horizontal range R, of a projectile is given by the expression; R = \(\frac{u^2 sin 2\theta}{g}\) where \(\theta\) is the angle of projection, g the acceleration of free fall due to gravity and u the initial velocity. At what value of \(\theta\) will R be maximium?
medium Difficulty
Physics WAEC / WASSCE 2003 Elasticity, Density, Pressure & Fluids
(a) What is surface tension? (b) State two methods by which the surface tension of a liquid can be reduced.
medium Difficulty
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