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Physics
UTME / JAMB 2015
Thermal Physics
Solution
The normal temperature of human body is record at what ranges?
A
27°C to 43°C
B
30°C to 40°
C
98.4°C only
D
Between 35°C to 37°C
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
The range of temperature is between 35°C and 43°C but for normal temperature of human body is between the range of 35°C to 37°C respectively
Source: Myschool Past Questions Archive (Record #41335)
Physics
WAEC / WASSCE 2015
Thermal Physics
Diagram
In an experiment in which a molten substance is allowed to cool, the cooling curve above was obtained. The temperature 60oC is known as the
Attached Figure / Diagram
A
vaporization point
B
cooling temperature
C
boiling point
D
melting point
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 #45456)
Physics
WAEC / WASSCE 2015
Thermal Physics
Solution
A quantity of hot water at 100oC is added to 400g of water at 10oC until the temperature of the mixture is 60oC.
Calculate the mass of the hot water added. [Specific heat capacity of water =4200JKg-1 K-1]
A
200g
B
320g
C
400g
D
500g
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
Heat lost by hot water = Heat gained by cold water
M x 4200 x (100 - 60 = 0.4 x 4200 x (60 - 10)
4200m x 40 = 0.4 x 4200 x 50
40m = 0.4 x 50
m = \(\frac{0.4 \times 50}{40}\) = 0.5kg
= 500g
Source: Myschool Past Questions Archive (Record #45450)
Physics
WAEC / WASSCE 2015
Thermal Physics
Which of the following radiations constitutes a stream of electrons?
A
Ramma rays
B
X-rays
C
Cathode rays
D
Radio waves
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 #45570)
Physics
WAEC / WASSCE 2015
Thermal Physics
Solution
State three ways of increasing the rate of cooling of a cup of hot tea.
medium Difficulty
Verified Correct Answer: Option
Physical Principles & Numerical Solution
Ways of increasing the cooling rate of a cup of tea are:
(i) Stirring the tea continuously.
(ii) Increasing the rate of evaporation.
(iii) Reducing the ambient temperature.
Source: Myschool Past Questions Archive (Record #52982)
Physics
UTME / JAMB 2014
Thermal Physics
Solution
The equation PaVbTc= constant reduces to Charles Law if
A
a=1, b=1and c=0
B
a=1, b=0 and c=-1
C
a=0, b=1 and c=1
D
a=0, b=1 and c=-1
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
if a=0, b=1 and c=-1 then
P0V1T-1 = V/T (Charles Law)
Source: Myschool Past Questions Archive (Record #26970)
Physics
UTME / JAMB 2014
Thermal Physics
The quantity of heat needed to raise the temperature of a body by 1K is the body's
A
Heat capacity
B
Internal energy
C
Specific heat capacity
D
Latent heat of fusion
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 #26971)
Physics
WAEC / WASSCE 2014
Thermal Physics
The temperature at which the water vapor in the air saturates the air and begins to condense is known as
A
dew point
B
critical point
C
boiling point
D
triple point
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 #35753)
Physics
WAEC / WASSCE 2014
Thermal Physics
Which of the following types of thermometers can be used to measure a range of temperature from -50^\circC to 50^\circ? i. Clinical ii. Mercury iii. Alcohol-in-glass
A
i only
B
ii only
C
iii only
D
i and ii only
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 #35755)
Physics
WAEC / WASSCE 2014
Thermal Physics
Solution
A quantity of water at 20oC is mixed with another quantity of water at 70oC. The final steady temperature of the mixture is 40oC. Determine the ratio of the mass of the cold water to that of the hot water
A
7:2
B
3:2
C
2:5
D
1:2
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
Q = MC\(\theta\)
M = \(\frac{Q}{C\theta}\)
\(\frac{Q}{20C}\) : \(\frac{Q}{30C}\)
= 3:2
Source: Myschool Past Questions Archive (Record #35757)
Physics
WAEC / WASSCE 2014
Thermal Physics
An aluminum foil is placed across a beam of radiation from a radioactive source. Which of the following types of radiation will be stopped by it?
A
alpha and beta particles
B
alpha and gamma particles
C
beta and gamma particles
D
gamma particles 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 #35783)
Physics
WAEC / WASSCE 2014
Thermal Physics
Diagram
The circuit above illustrates a standard resistor R, voltage source E and a lamp L connected in series. If the temperature of R is increased, the brightness of the lamp will
Attached Figure / Diagram
A
increase sharply
B
decrease slightly
C
remains the same
D
increase gradually
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 #35780)
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
Thermal Physics
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)