Thermodynamics Test

Result

Thermodynamics Test - 39

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Weekly Quiz Competition

Question 1
4 / -1

In the Cyclic Process shown is the figure, the work done by the gas in one cycle

A
40 P₁V₁

B
20 P₁V₁

C
10 P₁V₁

D
5 P₁V₁
Question 2
4 / -1

An ideal gas is taken V path ACBA as Shown in figure, The net work done in the whole cycle is

A
-3 P₁V₁

B
zero

C
5 P₁V₁

D
3 P₁V₁
Question 3
4 / -1

Two identical samples of a gas are allowed to expand (i) isothermally (ii) adiabatically work done is

A
more inanisothermal process

B
more is an adiabatic process

C
equal in both process

D
neither of them

Solution
Question 4
4 / -1

For adiabatic Process which relation is true mentioned below ?

A
p^γV = Const

B
T^γV = Const

C
TV^γ = Const

D
TV^γ-1 = Const
Question 5
4 / -1

A Car not engine operating between temperature T₁ and T₂ has efficiency 0.4, when T₂ lowered by 50 K, its efficiency increases to 0.5. Then T₁ and T₂ are respectively.

A
300 K and 100 K

B
400 K and 200 K

C
600 K and 400 K

D
400 K and 300 K

Solution
Question 6
4 / -1

A monoatomic gas is used in a car not engine as the working substance, If during the adiabatic expansion part of the cycle the volume of the gas increases from V to 8 V₁ the efficiency of the engine is ..

A
60%

B
50%

C
75%

D
25%

Solution
Question 7
4 / -1

A System under goes a Cyclic Process in which it absorbs Q₁ heat and gives out Q₂ heat. The efficiency of the Process is n and the work done is W. Which formula is wrong ?

A
W = Q₁ ‒ Q₂

B

C

D
Question 8
4 / -1

A carnot's engine whose sink is at a temperature of 300 K has an efficiency of 40% By space should the temperature of the source be increase the efficiency to 60%

A
275 K

B
325 K

C
300 K

D
250 K

Solution
Question 9
4 / -1

An ideal gas heat engine is operating between 227^o C and 127^o C. It absorbs 10⁴J Of heat at the higher temperature. The amount of heat Converted into. work is .......... J.

A
2000

B
4000

C
5600

D
8000

Solution
Question 10
4 / -1

A carnot engine takes 3 × 10⁶ cal of heat from a reservoir at 627^o C, and gives to a sink at 27^o C.The work done by the engine is

A
4.2 × 10⁶ J

B
16.8 × 10⁶ J

C
8.4 × 10⁶ J

D
zero

Solution