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The temperature inside a refrigerator is \( t_{2}{ }^{\circ} \mathrm{C} \) and the room temperature is \( t_{1}{ }^{\circ} \mathrm{C} \). The amount of heat
\( \mathrm{P} \) delivered to the room for each joule of electrical

W. energy consumed ideally will be
(a) \( \frac{t_{1}}{t_{1}-t_{2}} \)
(b) \( \frac{t_{1}+273}{t_{1}-t_{2}} \)
(c) \( \frac{t_{2}+273}{t_{1}-t_{2}} \)
(d) \( \frac{t_{1}+t_{2}}{t_{1}+273} \)
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