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Efficiency of a Carnot heat engine may b...

Efficiency of a Carnot heat engine may be given as

A

`(w)/(Q_(2))`

B

`1-(Q_(2))/(Q_(1))`

C

`1-(T_(1))/(T_(2))`

D

None of these

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Efficiency `(eta) = ("Work done")/("Heat supplied")`
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The efficiency of a Carnot heat engine

The efficiency of a carnot heat engine is 0.6 when the absolute temperatures of the source and sink are T_(1) and T_(2) respectively. The efficiency of another carnot engine is also 0.6 but the source and sink temperatures are different. What are the temperatures of the source and the sink of the other engine ?

Assertion: Efficiency of a heat engine can't be greater than efficiency of Carnot engine. Reason: Effieciency of any engine is never 100%

Efficiency of Carnot engine is 100% if

The efficiency of carnot's heat engine is 0.5 when the temperature of the source is T_(1) and that of sink is T_(2) .The efficiency of another crot's heat engine is also 0.5.the temperature of source and sink of the second engine are respecitvely

Assertion : Efficiency of a Carnot engine increase on reducing the temperature of sink. Reason : The efficiency of a Carnot engine is defined as ratio of net mechanical work done per cycle by the gas to the amount of heat energy absorbed per cycle from the source.

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