TS EAMCET 4-Aug-2021 Shift 1 Question Paper

Consider a two stage Carnot engine. In the first stage heat Q1 is absorbed at temperature T and heat Q2 is expelled at temperature αT (where α<1). In the second stage heat Q2 is absorbed at temperature αT and heat Q3 is expelled at temperature βT (β<α). The efficiency of the Carnot engine will be