11th Standard Syllabus & Materials
11th Standard
TN 11th Tamil இயற்கை வேளாண்மை,சுற்றுச்சூழல் -செய்யுள் - மனோன்மணீயம் Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
TN 11th Tamil என்னுயிர் என்பேன் -துணைப்பாடம் - இசைத்தமிழர் இருவர் Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
TN 11th Tamil மொழி கலை -செய்யுள் - ஒவ்வொரு புல்லையும் Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
TN 11th Tamil பீடு பெற நில் - இலக்கணம் - பகுபத உறுப்புகள் Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
TN 11th Tamil பீடு பெற நில் - துணைப்பாடம் - வாடிவாசல் Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
TN 11th Tamil பீடு பெற நில் - செய்யுள் - குறுந்தொகை Important Questions And Answers Study Material - QB365 Set A
Published on: 10/11/2020
11th Standard Physics Heat and Thermodynamics English Medium Free Online Test One Mark Questions with Answer Key 2020 - 2021
Download Tamil Nadu 11th Standard Physics question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Physics Test1.
The pressure of a gas contained in a closed vessel is increased by 0.4% when heated by 1°C. The initial temperature was ____________________.
250 K
250°C
25 K
25oC
2.
Two vessels A and B contain the same ideal gas. The volume of B is twice that of A, the pressure in B is twice that in A and the temperature of B is twice that of A. The ratio of the number of gas molecules in A and B is _______________.
1:2
2:1
1:4
4:1
3.
A perfect gas at 27°C is heated at constant pressure so as to double its volume. The temperature of the gas becomes _____________.
54°C
150K
327°C
327K
4.
A steel rod of length 25 cm has a cross-sectional area of 0.8 cm2. The force required to stretch this rod by the same amount as the expansion produced by heating it through woe is ___________ (coefficient of linear expansion of steel is 10-5/oC and Young's modulus of steel is 2\(\times\)1010 N/m2)
40 N
80 N
120 N
160 N
5.
A block of wood is floating on water at 0oC with a certain volume V above water level. The temperature of water is slowly raised to 20oC. How does the volume V change with the rise of temperature?
remain unchanged
decrease continuously
decrease till 4°C and then increase
increase till 4°C and then decrease
6.
The coefficient of volume expansion of a solid is x times the coefficient of superficial expansion. Then x is _____________.
1.5
2
2.5
3
7.
When two bodies are in thermal equilibrium with a third body, they are also in thermal equilibrium with each other. This is _____________.
Kelvin Planck law
first law of thermodynamics
zeroth law of thermodynamics
second law of thermodynamics
8.
The specific heat of water is ________________.
1.817
25.12
4.187
none
9.
A process in which the temperature of working substance remains constant during its expansion or compression ____________________.
isothermal
adiabatic
isobaric
isochoric
10.
Universal gas constant is _________________.
Cp/Cv
Cp - Cv
Cp + Cv
Cv/Cp
11.
In an adiabatic system which is true?
\({ P }^{ \gamma }{ T }^{ \gamma -1 }\) = Constant
\({ P }^{ \gamma }{ T }^{ 1-\gamma }\) = Constant
\({ PT }^{ \gamma }\) = Constant
\({ P }^{ 1-\gamma }{ T }^{ \gamma }\) = Constant
12.
Graph of specific heat at constant volume for a mono atomic gas is _______________.
13.
Surface of the lake is at 2°C and depth of the lake is 20m find the temperature of the bottom of the lake ______________.
20C
30C
40C
none of the above
14.
One kg of a diatomic gas is at a pressure of 8\(\times\)104 N/m2 the density of the gas is 4kglmg What is the energy of the gas due to its thermal mole ______________.
3\(\times\)104 J
5\(\times\)104 J
6\(\times\)104 J
7\(\times\)104 J
15.
1 mole of a gas with \(\gamma =\frac { 7 }{ 5 } \) is mixed with 1 mole of gas with \(\gamma =\frac { 5 }{ 3 } \) then value of g of the resulting mixture is ____________.
\(\frac { 7 }{ 5 } \)
\(\frac { 2 }{ 5 } \)
\(\frac { 3 }{ 2 } \)
\(\frac { 12 }{ 7 } \)
16.
The efficiency of a heat engine working between the freezing point and boiling point of water is
6.25%
20%
26.8%
12.5%
17.
Identify the state variables given here?
Q, T, W
P, T, U
Q, W
P, T, Q
18.
A hot cup of coffee is kept on the table. After some time it attains a thermal equilibrium with the surroundings. By considering the air molecules in the room as a thermodynamic system, which of the following is true
ΔU > 0, Q = 0
ΔU > 0, W < 0
ΔU > 0, Q > 0
ΔU = 0, Q > 0
19.
When food is cooked in a vessel by keeping the lid closed, after some time the steam pushes the lid outward. By considering the steam as a thermodynamic system, then in the cooking process
Q > 0, W > 0,
Q < 0, W > 0,
Q > 0, W < 0,
Q < 0, W < 0,
20.
1.
(a)
250 K
2.
(a)
1:2
3.
(c)
327°C
4.
(d)
160 N
5.
(a)
remain unchanged
6.
(a)
1.5
7.
(c)
zeroth law of thermodynamics
8.
(c)
4.187
9.
(a)
isothermal
10.
(b)
Cp - Cv
11.
(d)
\({ P }^{ 1-\gamma }{ T }^{ \gamma }\) = Constant
12.
(c)
13.
(d)
none of the above
14.
(d)
7\(\times\)104 J
15.
(c)
\(\frac { 3 }{ 2 } \)
16.
\(\mathrm{T}_{2} =0^{\circ} \mathrm{C}+273=273 \mathrm{~K} \)
\(\mathrm{~T}_{1}=100^{\circ} \mathrm{C}=100+273=373 \mathrm{~K} \)
\(\eta =1-\frac{T_{2}}{T_{1}} \)
\(=1-\frac{273}{373} \)
\(=\frac{373-273}{373} \)
\(=\frac{100}{373}=0.26809 \times 100 \)
\(=26.809 \% \)
17.
(b)
P, T, U
18.
During the thermal equilibrium with surroundings internal energy is increased and heat energy will be increased.
\(\Delta U>0 Q>0\)
19.
\(-Q>0 \quad W>0\)
\(\Delta Q=\Delta U+\Delta W\)
\(\therefore \Delta Q \propto \Delta W\)
\(\text { If } \Delta Q>0 \text { then } \Delta W>0\)
20.
(c)
11th Standard Syllabus & Materials
11th Standard
TN 11th Tamil பீடு பெற நில் - செய்யுள் - காவடிச்சிந்து Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
TN 11th Tamil பீடு பெற நில் - உரைநடை - மலை இடப்பெயர்கள் : ஓர் ஆய்வு Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
TN 11th Tamil மாமழை போற்றுதும் - துணைப்பாடம் - யானை டாக்டர் Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
TN 11th Tamil மாமழை போற்றுதும் - செய்யுள் - ஐங்குறுநூறு Important Questions And Answers Study Material - QB365 Set A
Tamilnadu Stateboard 11th Standard Subjects
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Biology
Business Maths and Statistics
Accountancy
Computer Science
Physics
Chemistry
Maths
Biology
Economics
Physics
Chemistry
History
Business Maths and Statistics
Computer Science
Accountancy
Computer Applications
History
Computer Technology
Commerce
Computer Applications
Computer Technology
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