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Physics
UTME / JAMB 2013
Current Electricity & Electric Circuits
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
Temperature, Thermometry & Thermal Expansion
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
Atomic, Quantum, Nuclear Physics & Electronics
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
Work, Energy, Power & Simple Machines
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)
Physics
UTME / JAMB 2013
Calorimetry, Latent Heat & Change of State
Solution
Two liquids X and Y having the same mass are supplied with the same quantity of heat. If the temperature rise in X is twice that of Y, the ratio of specific heat capacity of X to that of Y is
A
2:1
B
1:2
C
4:1
D
1:4
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
MC\(x_\theta\) = MC\(y_\theta\)
\(x_\theta\) = 2 \(\times y_\theta\)
MC(2\(y_\theta\)) = MC\(y_\theta\)
⇒ 2C = C
=1 : 2
Source: Myschool Past Questions Archive (Record #27325)
Physics
UTME / JAMB 2013
Calorimetry, Latent Heat & Change of State
Steam from boiling water causes more damage on the skin than does boiling water because
A
water has a high specific heat
B
steam has latent heat of fusion
C
the steam is at a highter temperature than the water
D
steam brings heat more easily by convection
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 #27346)
Physics
UTME / JAMB 2013
Calorimetry, Latent Heat & Change of State
What will happen to the boiling point of pure water when it is heated in a place 30m below sea level?
A
It will be more than 100 oC
B
It will be last than 100 oC
C
It will still be at 100 oC
D
It will be fluctuating
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 #27347)
Physics
UTME / JAMB 2013
Elasticity, Density, Pressure & Fluids
The rise or fall of a liquid in a narrow tube is because of the
A
viscosity of the liquid
B
surface tension of the liquid
C
friction between the walls of the tube and the liquid
D
osmotic pressure of the liquid
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 #27348)
Physics
UTME / JAMB 2013
Gas Laws & Heat Transfer
The mechanism of heat transfer from one point to another through the vibration of the molecules of the medium is
A
covection
B
conduction
C
radiation
D
diffusion
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 #27349)
Physics
UTME / JAMB 2013
Waves, Sound & Vibrations
A wave that travels through stretched strings is known as
A
electromagnetic wave
B
micro wave
C
mechanical wave
D
seismic wave
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option C.
Source: Myschool Past Questions Archive (Record #27350)
Physics
UTME / JAMB 2013
Waves, Sound & Vibrations
A transverse wave and a longitudinal wave travelling in the same direction in a medium differ essentially in their
A
frequency
B
amplitude
C
direction of vibration of the particles of the medium
D
period of vibration of the particles of the medium
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option C.
Source: Myschool Past Questions Archive (Record #27351)
Physics
UTME / JAMB 2013
Current Electricity & Electric Circuits
Solution
What is the velocity of sound at 100 oC if the velocity of sound at 0 oC is 340ms -1?
A
497m-1
B
440m-1
C
397m-1
D
240m-1
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
\(V \propto \sqrt{T}\)
⇒ \(\frac{V_{1}}{\sqrt{T_{1}}} = \frac{V_{2}}{\sqrt{T_{2}}}\)
Using the above formula, we get
\(V_{2} \approxeq 397ms^{-1}\)
Source: Myschool Past Questions Archive (Record #27352)
Physics
UTME / JAMB 2013
Waves, Sound & Vibrations
Solution
If a sonometer has a fundamental frequency of 450HZ, what is the frequency of the fifth overtone?
A
2700Hz
B
456Hz
C
444Hz
D
75Hz
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
5th Overtone = 6fo = 6 x 450 = 2700Hz
Source: Myschool Past Questions Archive (Record #27353)
Physics
UTME / JAMB 2013
Reflection, Refraction & Dispersion of Light
Solution
A man 1.5m tall is standing 3m in front of a pinhole camera whose distance between the hole and the screen is 0.1m. What is the height of the image of the man on the screen?
A
0.05m
B
0.15m
C
0.30m
D
1.00m
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
\(h_i = \frac{h_o \times V}{u}\)
\(h_i = \frac{1.5 \times 0.1}{3}\)
= 0.05m
Source: Myschool Past Questions Archive (Record #27354)
Physics
UTME / JAMB 2013
Lenses & Optical Instruments
Solution
If the linear magnification of the objective and eyepiece convex lenses of a compound microscope are 4 and 7 respectively. Calculate the angular magnification of the microscope
A
2
B
3
C
11
D
28
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
M = M1 x M2 = 4 x 7 = 28
Source: Myschool Past Questions Archive (Record #27357)