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Consider a heat engine as shown in figur...

Consider a heat engine as shown in figure. `Q_(1)and Q_(2)` are heat added both to `T_(1)` and heat taken from `T_(2)` in one cycle of engine. W is the mechanical work done on the engine.

If `Wgt0`, then possibilities are

A

`Q_(1)gtQ_(2)gt0`

B

`Q_(2)gtQ_(1)gt0`

C

`Q_(2)ltQ_(1)lt0`

D

`Q_(1)lt0, Q_(2)gt0`

Text Solution

Verified by Experts

The correct Answer is:
A, C
Consider the figure we can write `Q_(1)=W+Q_(2)`
`rArr" "W=Q_(1)-Q_(2)gt0 " "("By question")`
`rArr" "Q_(1)gtQ_(2)gt0" "("If both "Q_(1)andQ_(2)" are positive")` ltBrgt We can also, write `Q_(2)ltQ_(1)lt0 ("If both "Q_(1)andQ_(2)" are negative")`.
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