Determine ratio of engine efficiency shown in figure to efficiency of carnot engine operating between temperatures TH and TC
1
\(\frac{{{T_H} - {T_C}}}{{{T_H} - {T_i}}}\)
2
\(\frac{{{T_H} - {T_C}}}{{{T_H} + {T_i}}}\)
3
\(\frac{{{T_H}}}{{{T_H} + {T_i}}}\)
4
\(\frac{{{T_i}}}{{{T_H} + {T_i}}}\)