If the co-efficient of performance of a refrigerator is 5 and operates at the room temperature (27 °C), find the temperature inside the refrigerator.

<p><span data-teams="true">This is a short answer type question as classified in NCERT Exemplar</span></p><p>Coefficient of<span contenteditable="false"> <math> <mi>β</mi> <mo>=</mo> <mn>5</mn> </math> </span></p><p>T₁= 27+273=300K</p><p>Coefficient of performance<span contenteditable="false"> <math> <mi>β</mi> <mo>=</mo> <mfrac> <mrow> <mrow> <msub> <mrow> <mrow> <mi>T</mi> </mrow> </mrow> <mrow> <mrow> <mn>2</mn> </mrow> </mrow> </msub> </mrow> </mrow> <mrow> <mrow> <mn>300</mn> <mo>-</mo> <msub> <mrow> <mrow> <mi>T</mi> </mrow> </mrow> <mrow> <mrow> <mn>2</mn> </mrow> </mrow> </msub> </mrow> </mrow> </mfrac> </math> </span></p><p>1500-5T₂=T₂</p><p>6T₂=1500</p><p>T₂= 250K</p><p>T₂= 250-273=-23^oC</p>

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