Question

What percentage T₁ is of T₂ for a 10% efficiency of a heat engine ? T₁ is the temperature of sink and T₂ is the temperature of heat reservoir.

• A. T₁ = 90% of T₂
• B. T₁ = T₂
• C. T₂ = 90% of T₁
• D. T₁ = 50% of T₂

Answer 1

Answer: (A)

T₁ = 90% of T₂

Answer 2

Efficiency ,h = $\frac{T_{2} - T_{1}}{T_{2}}$ = 1– $\frac{T_{1}}{T_{2}}$ = 0.1

or T₁ = 0.9 T₂