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Physics
NECO SSCE 2004
Mechanics and Properties of Matter
A plane which is Inclined at an angle of 30 ° to the horizontal has a velocity ratio of
A
2
B
1
C
0.87
D
0.67
E
0.5
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option A.
Source: Myschool Past Questions Archive (Record #42961)
Physics
NECO SSCE 2004
Mechanics and Properties of Matter
A mass of 5kg is suspended from the ceiling of a lift with a light inextensible string. As the lift moves upwards with an acceleration of 2ms-2, the tension in the string is [g = 10ms-2]
A
25N
B
40N
C
50N
D
60N
E
70N
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option B.
Source: Myschool Past Questions Archive (Record #42962)
Physics
NECO SSCE 2004
Mechanics and Properties of Matter
An electron makes a transition from - 1.60 eV energy level to - 10.4eV energy level Calculate the energy loss due to the transition.
A
16.64eV
B
12.00eV
C
10.40eV
D
8.80eV
E
6.50eV
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option D.
Source: Myschool Past Questions Archive (Record #42970)
Physics
NECO SSCE 2004
Mechanics and Properties of Matter
Solution
A projectile fired with initial velocity, u will attain its maximum height H when the angle of projection \theta is
A
30°
B
45°
C
60°
D
75°
E
90°
medium Difficulty
Verified Correct Answer: Option E
Physical Principles & Numerical Solution
The maximum height (H) of a projectile is given by:
\(H=\frac{u^2\sin^2\theta}{2g}\)
Since (u) (initial velocity) and (g) (acceleration due to gravity) are fixed, the maximum height depends on \(\sin^2\theta\).
The largest value of \(\sin\theta\) is 1, which occurs when:
\(\theta = 90^\circ\).
Source: Myschool Past Questions Archive (Record #42972)
Physics
NECO SSCE 2004
Mechanics and Properties of Matter
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
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option B.
Source: Myschool Past Questions Archive (Record #42978)
Physics
NECO SSCE 2004
Mechanics and Properties of Matter
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
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option A.
Source: Myschool Past Questions Archive (Record #42979)
Physics
NECO SSCE 2004
Mechanics and Properties of Matter
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
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option B.
Source: Myschool Past Questions Archive (Record #42981)
Physics
NECO SSCE 2004
Mechanics and Properties of Matter
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
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option B.
Source: Myschool Past Questions Archive (Record #42983)
Physics
NECO SSCE 2004
Mechanics and Properties of Matter
Solution
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
Verified Correct Answer: Option E
Physical Principles & Numerical Solution
Convert the speed from kilometers per hour (\(\text{km/h}\)) to meters per second (\(\text{m/s}\)) by multiplying by 45 x \(\frac{1000}{3600}\) = 12.5m/s
But distance = velocity x time = 12.5 x 20 = 250m.
Source: Myschool Past Questions Archive (Record #42984)
Physics
NECO SSCE 2004
Mechanics and Properties of Matter
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
Verified Correct Answer: Option E
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option E.
Source: Myschool Past Questions Archive (Record #42986)
Physics
NECO SSCE 2004
Mechanics and Properties of Matter
Solution
The resultant of two forces P and Q is least when the angle between them is
A
0°
B
45°
C
60°
D
90°
E
180°
medium Difficulty
Verified Correct Answer: Option E
Physical Principles & Numerical Solution
The two forces will have minimum resultant if both are acting in opposite directions (that is at an angle of 180 ^\circ between them).
Source: Myschool Past Questions Archive (Record #42991)
Physics
NECO SSCE 2004
Mechanics and Properties of Matter
Calculate the energy stored in an inductor of inductance 0.5H when a current of 3A flows through it.
A
15.00 J
B
9.45 J
C
6.00 J
D
4.50J
E
2.25 J
medium Difficulty
Verified Correct Answer: Option E
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option E.
Source: Myschool Past Questions Archive (Record #42993)
Physics
NECO SSCE 2004
Mechanics and Properties of Matter
The relative density of dilute tetraoxosulphate (vi) acid in a battery is measured with a
A
barometer
B
hydrometer
C
manometer
D
hypsometer
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option B.
Source: Myschool Past Questions Archive (Record #42994)
Physics
WAEC / WASSCE 2004
Mechanics and Properties of Matter
Solution
(a) Define Young's modulus
(b) When a force of 50 N is applied to the free end of an elastic cord, an extension of 4 cm is produced in the cord. Calculate the work done on the cord.
medium Difficulty
Verified Correct Answer: Option
Physical Principles & Numerical Solution
(a) Young's modulus is the ratio of tensile or compressive stress to tensile or compressive strain.
(b) W = \(\frac{1}{2}\)K = \(\frac{1}{T}\) x 50 x 0.04 = 1.0J
Source: Myschool Past Questions Archive (Record #53955)
Physics
WAEC / WASSCE 2004
Mechanics and Properties of Matter
Solution
(a) List two properties of cathode rays
(b) Explain how the intensity and energy of cathode rays may be increased
medium Difficulty
Verified Correct Answer: Option
Physical Principles & Numerical Solution
(a) Properties of cathode rays: They are;
(i) Negatively charged
(ii) Possess energy
(iii) Possess momentum
(iv) Travel in straight lines in field free space.
(v) Are deflected by electric and magnetic fields.
(b) (i) The intensity of cathode rays can be increased by increasing the temperature of the cathode.
(ii) The energy of cathode ray cen be increased by increasing the P.d between the anode and the cathode.
Source: Myschool Past Questions Archive (Record #53956)