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(B) The efficiency of a heat engine is given by the formula:$\eta = 1 - \frac{T_2}{T_1} = \frac{T_1 - T_2}{T_1}$where $T_1$ is the temperature of the

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increases

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(B) The efficiency of a heat engine is given by the formula:$\eta = 1 - \frac{T_2}{T_1} = \frac{T_1 - T_2}{T_1}$where $T_1$ is the temperature of the source and $T_2$ is the temperature of the sink.From this equation,it is evident that the efficiency $\eta$ is directly proportional to the temperature difference $(T_1 - T_2)$.Therefore,as the temperature difference between the source and the sink increases,the efficiency of the heat engine increases.

When the temperature difference between the source and sink increases,the efficiency of the heat engine

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