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Physics NECO SSCE 2004 Waves, Sound & Vibrations
A surface in the path of an advancing wave on which all the particles are in the same state of disturbance is called a
A
crest
B
cycle
C
pulse
D
trough
E
wave front
medium Difficulty
Physics NECO SSCE 2004 Waves, Sound & Vibrations
Calculate the wavelength of light travelling with a speed of 3 × 108ms-1 and a frequency of 6.2 × 1014Hz.
A
4.8 × 10-8m
B
4.8 × 10-7m
C
4.8 × 10-6m
D
4.8 × 10-5m
E
4.8 × 10-4m
medium Difficulty
Physics NECO SSCE 2004 Current Electricity & Electric Circuits
What is the uncertainty in the measurement of time, if the uncertainty in measuring the energy of an electron of mass 10-30 kg is 2.45 × 10-19J? h = 6.6 × 10-34
A
1.35 ×10-15s
B
2.69 × 10-15s
C
4.15 × 10-15s
D
9.05 × 10-15s
E
1.62 × 10-14s
medium Difficulty
Physics NECO SSCE 2004 Equilibrium of Forces, Moments & Flotation
A body has masses of 0.013kg and 0.012 kg in oil and water respectively. If the relative density of oil is 0.875 calculate the mass of the body.
A
0.02 kg
B
0.03kg
C
0.04kg
D
0.05kg
E
0.06kg
medium Difficulty
Physics NECO SSCE 2004 Current Electricity & Electric Circuits
A stone is dropped from the top of a tower of height 11 .25m. Calculate the time it will take to reach the ground. [g = 10ms-2]
A
1.00s
B
1.50s
C
2.25s
D
2.50s
E
3.00s
medium Difficulty
Physics NECO SSCE 2004 Current Electricity & Electric Circuits
The rate of diffusion of gases increases with increase(s) in I. density II. temperature III, mass. Which is/are correct?
A
I only
B
II only
C
I and II only
D
II and III only
E
I, II and III
medium Difficulty
Physics NECO SSCE 2004 Current Electricity & Electric Circuits
In which of the following are crystalline structures observable? I. Gas II. Liquid III. Solid
A
I only
B
II only
C
III only
D
I and III only
E
II and III only
medium Difficulty
Physics NECO SSCE 2004 Temperature, Thermometry & Thermal Expansion
Heat I. is a form of energy II. is measured with a thermometer III. cannot be created or destroyed IV. from a hot object is transferred through conduction only. Which of the statements above are correct?
A
I and II only
B
I and III only
C
I, II and III only
D
II, III and IV only
E
I, II, III and IV
medium Difficulty
Physics NECO SSCE 2004 Current Electricity & Electric Circuits
A car travels with a constant velocity of 45 kmh-1 for 20s. What distance does it cover in this time?
A
0.025m
B
0.250m
C
2.500m
D
25.000m
E
250.000m
medium Difficulty
Physics NECO SSCE 2004 Current Electricity & Electric Circuits
When the same amount of current, I is passed through different wires under the same conditions, the rates of production of heat are
A
directly proportional to I
B
directly proportional to the resistances of the wires
C
directly proportional to the square of the resistances of the wires
D
inversely proportional to I
E
inversely proportional to the resistance of the wires
medium Difficulty
Physics NECO SSCE 2004 Magnetism, Electromagnetism & AC Circuits
A current flows in a series circuit containing a resistor, R, an inductor, L and a capacitor, C. Which of the following is true of the power dissipated in the circuit component(s)?
A
The power dissipated in L is greater than zero
B
The power dissipated in R is zero
C
The sum of the power dissipated in L and C is equal to that in R
D
The sum of the power dissipated in L and C is greater than in R
E
The sum of the power dissipated in L and C is zero
medium Difficulty
Physics NECO SSCE 2004 Atomic, Quantum, Nuclear Physics & Electronics
Emission spectra are caused by
A
kinetic energy of moving atoms
B
potential energy of an electron in an atom
C
transition of an electron from a higher energy level to a lower energy level
D
transition of an electron from a lower energy level to higher energy level
E
transition of excited protons in the nucleus.
medium Difficulty
Physics NECO SSCE 2004 Current Electricity & Electric Circuits
Which of the following is used as a depolarizer in a Denial cell?
A
Ammonium chloride
B
Copper (II) tetra Oxo sulphate (VI) solution
C
Manganese (IV) oxide
D
Tetraoxo sulphate (VI) acid
E
Water
medium Difficulty
Physics NECO SSCE 2004 Atomic, Quantum, Nuclear Physics & Electronics
A radioactive isotope has a half-life of 8 days. What fraction of the atoms will remain after 72 days?
A
9.766 × 10-4
B
1.736 ×10-3
C
1.953 ×10-3
D
3.472 × 10-3
E
3.906 x 10-3
medium Difficulty
Physics NECO SSCE 2004 Electrostatics & Capacitors
If the distance between the plates of a parallel plate capacitor is decreased, its capacitance
A
becomes zero
B
decreases
C
increases
D
is halved
E
remains the same
medium Difficulty
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