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Question

If coefficient of performance of $$A$$ refrigerator is $$\beta$$ and heat given to surrounding is $$Q_2$$ then what is heat absorbed.


Solution

$$\beta=\dfrac{Q_2}{Q_2-Q_1}$$
$$\beta=\dfrac{Q_2}{Q_2-Q_1}$$
so $$\beta Q_2-\beta Q_1=Q_2$$
$$\dfrac{Q_2(\beta -1)}{\beta}=Q_1$$

Physics

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