Test: Carnot engine - JEE MCQ
10 Questions MCQ Test Chemistry for JEE Main & Advanced - Test: Carnot engine
If an air conditioner is put in the middle of a room and started working
In the following P−V diagram two adiabatics cut two isothermals at temperatures 
and 
(fig). The value of 
will be
and (fig). The value of will be
A heat engine absorbs heat 
at temperature 
and heat 
at temperature 
. Work done by the engine is 
. This data:
at temperature and heat at temperature . Work done by the engine is . This data:
, for heat engines, because initial and final states are same. Internal energy is a state function.
Total heat exchanged
A Carnot engine operating between temperatures 
and 
has efficiency 
When 
is lowered by 
its efficiency increases to 
Then 
and 
are, respectively
and 
If the co-efficient of performance of a refrigerator is 5 and operates at the room temperature 
, the temperature inside the refrigerator is
or 
The temperature-entropy diagram of a reversible engine cycle is given in the figure. Its efficiency is
and 
A Carnot engine whose efficiency is 
has an exhaust temperature of 
. If the efficiency is to be 
with the same intake temperature, the exhaust temperature must be (in K)
or 
If the energy input to a Carnot engine is thrice the work it performs then, the fraction of energy rejected to the sink is
In a Carnot engine, the temperature of reservoir is 
and that of 
is 
. If the work done by the engine when it transfers heat from reservoir to sink is 
, the quantity of heat absorbed by the engine from the reservoir is
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