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Physics
UTME / JAMB 2009
Mechanics and Properties of Matter
Solution
An electric lamp marked 240v, 60 W is left to operate for an hour. How much energy is generated by the filament?
A
3.86 x 105J
B
3.56 x 105J
C
1.80 x 104J
D
2.16 x 105J
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
Energy generated = power X time = 60w x 1h = 60 x 60 x 60 ws = 216000j = 2.16 x 105J
Source: Myschool Past Questions Archive (Record #14258)
Physics
UTME / JAMB 2009
Mechanics and Properties of Matter
Solution
A band of 500 rectangular loops of wire of area 20 cm by 20 cm, encloses a region of magnetic field which charges from 1.0T to 0.4T within 5 seconds, calculate the induced e.m.f.
A
5.60 v
B
24.00 v
C
0.24 v
D
2.40 v
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
Number of tunes, n = 500
Area, A = 0.2m + 0.2m = 0.4m2
change of flux density A B
= 1.0 - 0.4 = 0.6T
Tune, t = 5 su
Induced emf, ξ = (AB AN)/AT
(0.6 x 0. 04 x 500)/5
= 2.4v
Source: Myschool Past Questions Archive (Record #14262)
Physics
UTME / JAMB 2009
Heat Energy & Temperature
Solution
The process of energy production in the sun is?
A
nuclear fission
B
nuclear fusion
C
electron collision
D
radioactive decay
E
No Correct Option
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
The process of energy production in the sun is generally by nuclear fusion of hydrogen nuclei, the reaction of which takes place at a tremendous high temperature.
Source: Official Exam / Past Question Archive
Physics
UTME / JAMB 2009
Mechanics and Properties of Matter
Solution
The pressure of two moles of an ideal gas at a temperature of 27 ^\circC and volume 10\(^-2\)m\(^3\) is?
[R = 8.313 J mol\(^{-1}\)K\(^{-1}\)]
A
4.99 x 105 Nm-2
B
9.80 x 103 Nm-2
C
4.98 x 103 Nm-2
D
9.80 x 105 Nm-2
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
PV = nRT
∴ P = \(\frac{\text{nRT}}{\text{V}}\)
P = \(\frac{2 \times 8.313 \times 300}{10^{-2}}\)
= 4.987 x 10\(^5\) Nm\(^{-2}\)
Source: Myschool Past Questions Archive (Record #14500)
Physics
UTME / JAMB 2009
Waves and Optics
Diagram
Solution
The wave phenomenon demonstrated in the diagram above is?
Attached Figure / Diagram
A
reflection
B
deflection
C
diffraction
D
refraction
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
Diffraction is spreading of wave after passing through a slit
Source: Myschool Past Questions Archive (Record #14501)
Physics
UTME / JAMB 2009
Waves and Optics
Solution
If a light wave has a wavelength of 500nm in air what is the frequency of the wave?
[c = 3 x 10\(^8\) ms-1]
A
3.0 x 1014 Hz
B
6.0 x 1014 Hz
C
6.0 x 1012 Hz
D
2.5 x 1014 Hz
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
f = \(\frac{\text{c}}{\lambda}\)
f = \(\frac{ 3 \times 10^8}{500 \times 10^{-9}}\)
= 6.0 x 10\(^{14}\) Hz
Source: Myschool Past Questions Archive (Record #14503)
Physics
WAEC / WASSCE 2009
Heat Energy & Temperature
In which of the following states of matter do the molecules vibrate about their mean positions?
A
liquids only
B
solids only
C
liquids and gasses only
D
solids, liquids and gases
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 #35132)
Physics
WAEC / WASSCE 2009
Heat Energy & Temperature
Which of the following properties of a steel bar can be measured in terms of the dimension of length only?
A
weight
B
density
C
pressure
D
volume
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 #35133)
Physics
WAEC / WASSCE 2009
Mechanics and Properties of Matter
Solution
In a hydraulic press, a force of 40N is applied to the smaller priston of area 10cm2. If the area of the larger piston is 200cm2, calculate the force obtained
A
800N
B
500N
C
80N`
D
50N
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
\(F_2 = \frac{F_1 \times A_2}{A_1} = \frac{40 \times 200}{10} = 800N\)
Source: Myschool Past Questions Archive (Record #35134)
Physics
WAEC / WASSCE 2009
Mechanics and Properties of Matter
Solution
A body of volume 0.046m3 is immersed in a liquid of density 980kgm-3 with \(\frac{3}{4}\) of its volume submerged. Calculate the upthrust on the body. [g = 10ms-2]
A
11.27N
B
33.81N
C
112.70N
D
338.10N
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
M = D x V
= 980 x 0.046 x \(\frac{3}{4}\) = 33.81kg
upthrust = mg = 33.81 x 10
= 338.1N
Source: Myschool Past Questions Archive (Record #35135)
Physics
WAEC / WASSCE 2009
Mechanics and Properties of Matter
Which of the following types of types of motion will be produced when a pair of equal and opposite non-collinear parallel forces acts on a body?
A
vibrational motion
B
random motion
C
translational motion
D
rotational motion
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 #35139)
Physics
WAEC / WASSCE 2009
Mechanics and Properties of Matter
Solution
A body moving in a circle at constant speed has i. a velocity tangent to the circle ii. a constant kinetic energy iii. an acceleration directed towards the circumference of the circle. Which of the statements above are correct?
A
i and ii only
B
ii and iii only
C
i and iii only
D
i, ii and iii
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
A body moving along a circular path with constant speed such that it traverses equal arc-length in equal intervals of time. Displacement, velocity and acceleration changes at each point on the trajectory. Hence, the speed is uniform and consequently the kinetic energy is also constant throughout.
Source: Myschool Past Questions Archive (Record #35145)
Physics
WAEC / WASSCE 2009
Mechanics and Properties of Matter
The following properties of a solid are measured on earth i. weight ii. specific heat capacity iii. density. Which of the properties will hav a different value if measured in space?
A
i only
B
ii only
C
iii only
D
ii and iii only
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 #35150)
Physics
WAEC / WASSCE 2009
Mechanics and Properties of Matter
Solution
Two forces 6N and 8N, act eastwards and northwards respectively on a body. Calculate the magnitude of their equilibrant
A
2N
B
7N
C
10N
D
14N
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
R = \(\sqrt{A^2 + B^2} = \sqrt{6^2 + 8^2} = 10N\)
Source: Myschool Past Questions Archive (Record #35152)
Physics
WAEC / WASSCE 2009
Heat Energy & Temperature
The period of a simple pendulum of length 80.0cm was found to have doubled when the length of the pendulum was increased by X. Calculate X.
A
26.7cm
B
40.0cm
C
160.0cm
D
240.0cm
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 #35155)