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Physics
WAEC / WASSCE 2013
Application of Lens
Which of the following statements about the Galilean telescope is not correct?
A
the final image is inverted
B
it is shorter than terrestial telescope
C
the final image is erect
D
it has a small field of view
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: WAEC / JAMB / NECO Classroom Archive (Record #35679)
Physics
UTME / JAMB 2013
Heat Energy & Temperature
When a brick is taken from the earth's surface to the moon, its mass
A
remains constant
B
reduces
C
increases
D
becomes zero
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 #27107)
Physics
UTME / JAMB 2013
Mechanics and Properties of Matter
Solution
The resultant of two forces is 50N. If the forces are perpendicular to each other and one of them makes an angle 0f 30o with the resultant, find its magnitude.
A
100.0N
B
57.7N
C
43.3N
D
25.0N
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
F = 50Cos30o = 43.3
Source: Myschool Past Questions Archive (Record #27112)
Physics
UTME / JAMB 2013
Heat Energy & Temperature
Solution
The pair of physical quantities that are scalar only are ?
A
volume and area
B
moment and momentum
C
length and displacement
D
Impulse and time
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
This is because volume and the area have only magnitude but no direction
Source: Myschool Past Questions Archive (Record #27115)
Physics
UTME / JAMB 2013
Heat Energy & Temperature
Solution
A simple pendulum of length 0.4m has a period of 2s. What is the period a similar pendulum of length 0.8m at the same place?
A
8s
B
4s
C
2\(\sqrt{2}s\)
D
\(\sqrt{2}s\)
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
T2 = \(\sqrt{\frac{L^2 \times T_1^2}{L_1}}\)
= \(\sqrt{\frac{0.8 \times 2^2}{0.4}}\)
= 2\(\sqrt{2}s\)
Source: Myschool Past Questions Archive (Record #27122)
Physics
UTME / JAMB 2013
Mechanics and Properties of Matter
Solution
A train with an initial velocity of 20ms-1 is subjected to a uniform deceleration of 2m-2. The time required to bring the train to a complete halt is?
A
5s
B
10s
C
20s
D
40s
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
t = \(\frac{v - u}{a}\) = \(\frac{0 - 20}{-2}\) = 10s
Source: Myschool Past Questions Archive (Record #27124)
Physics
UTME / JAMB 2013
Mechanics and Properties of Matter
Solution
Calculate the apparent weight loss of a man weighing 70kg in an elevator moving downwards with an acceleration of 1.5ms-2.
[g = 10ms-2]
A
686N
B
595N
C
581N
D
105N
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
Wt loss = mg - m (g - a)
= 70 x 10 - 70 (10 - 1.5) = 105N
Source: Myschool Past Questions Archive (Record #27126)
Physics
UTME / JAMB 2013
Mechanics and Properties of Matter
Solution
A piece of cork floats in a liquid. What fraction of its volume will be immersed in the liquid?
[Density of the cork = 0.25 x 103kgm-3, Density of the liquid = 1.25 x 103kgm-3]
A
0.8
B
0.5
C
0.2
D
0.1
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
\(\frac{0.25 \times 10^3} {1.25 \times 10^3}\) = 0.2
Source: Myschool Past Questions Archive (Record #27128)
Physics
UTME / JAMB 2013
Mechanics and Properties of Matter
Solution
An object is moving with a velocity of 5m-1. At what height must a similar body be situated to have a potential energy equal in value with kinetic energy of the moving body?
A
25.0m
B
20.0m
C
1.3m
D
1.0m
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
P.E = K.E
Therefore, h = \(\frac{v^2}{2g} = \frac{5^2}{2 \times 10}\)
= 1.25
Approx 1.3 (C)
Source: Myschool Past Questions Archive (Record #27315)
Physics
UTME / JAMB 2013
Mechanics and Properties of Matter
Solution
If a pump is capable of lifting 5000kg of water through a vertical height of 60m in 15 min, the power of the pump is
A
2.2.5 x 10 5js-1
B
2.5 x 104js-1
C
3.3 x 103js-1
D
3.3 x 102js-1
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
P = \(\frac{mgh}{t}\)
P = \(\frac{5000 \times 10 \times 60}{(15 \times 60)s}\)
P = 3333.3333
P = 3.3 x 103js-1
Source: Myschool Past Questions Archive (Record #27316)
Physics
UTME / JAMB 2013
Mechanics and Properties of Matter
Solution
Calculate the work done when a force of 20N stretches a spring by 50mm.
A
0.5J
B
1.5J
C
2.0J
D
2.5J
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
W = \(\frac{1}{2}Fe\)
W = \(\frac{1}{2}\times 20 \times 0.05\)
W = 0.5J
Source: Myschool Past Questions Archive (Record #27319)
Physics
UTME / JAMB 2013
Mechanics and Properties of Matter
Solution
What volume of alcohol will have same mass as 4.2m-3 of petrol?
Density of alcohol = 8.4 x 10^2 kgm-3, density of petrol =7.2x10^2 kgm-3
A
0.8m3
B
1.4m3
C
3.6m3
D
49.m3
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
Mp = ep x Vp
Mp = 7.2 x 102 x 4.2 = 3024
VA = \(\frac{M}{e_A}\)
VA = \(\frac{3024}{8.4 \times 10^2}\)
VA = 3.6
Source: Myschool Past Questions Archive (Record #27321)
Physics
UTME / JAMB 2013
Thermal Physics
Solution
Calculate the length which corresponds to a temperature of 20oC if the ice and steam points of an unguarded thermometer are 400 mm apart
A
20mm
B
30mm
C
60mm
D
80mm
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
At 100oC = 400
Therefore,
At 20oC = \(\frac{400}{100} \times \frac{20}{1}\) = 80
Source: Myschool Past Questions Archive (Record #27322)
Physics
UTME / JAMB 2013
Thermal Physics
Solution
A wire of length 100.0m at 30o has linear expansive of 2x10-5K-1 Calculate the length of the wire at a temperature of - 10oC
A
100.08m
B
100.04m
C
99.96m
D
99.92m
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
\(L_2 = L_1 + \alpha(\theta_2 - \theta_1)\)
= 100 + 0.00002(-10-30) = 99.92
Source: Myschool Past Questions Archive (Record #27323)
Physics
UTME / JAMB 2013
Mechanics and Properties of Matter
Solution
A gas at a pressure of 105Nm-2expands from 0.6m-3 to 1.2m3 at constant temperature, the work done is
A
7.0 x 106J
B
6.0 x 10 6J
C
6.0 x 10 5J
D
6.0 x 10 4J
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
W = \(\frac{W_1 \times V_1}{V_2}\)
W = \(\frac{10 \times 0.6}{1.2}\)
W = 6.0 x 10 4J
Source: Myschool Past Questions Archive (Record #27324)