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Consider a heat engine as shown in (figu...

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

If `Wgt0`, then possibillities are:

A

`Q_(1) gt Q_(2) gt 0`

B

`Q_(2) gt Q_(1) gt 0`

C

`Q_(2) lt Q_(1) lt 0`

D

`Q_(1) lt 0,Q_(2) gt 0`

Text Solution

Verified by Experts

The correct Answer is:
A, C
(figure). Represents the working of a refrigerator, wherein `Q_(1)= Q_(2)+W`
If `W gt 0, Q_(1) gt 0`.
Both `Q_(1)` and `Q_(2)` are positive.
If `Q_(2)` is negative, `Q_(1)` is also negative (but less negative as `W gt 0`). `:. Q_(2) lt Q_(1) lt 0`
Choices (a) and (c ) are corrcet.
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Knowledge Check

  • 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`
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