-
An engine has an efficiency of 1/6. When the temperature of sink is reduced by 62°C, its efficiency is doubled. Temperature of the source is
-
- 37°C
- 62°C
- 99°C
- 124°C
Correct Option: C
| Since efficiency of engine is η = 1 - | ||
| T1 |
According to problem,
| = 1 - | ......(1) | |||
| 6 | T1 |
When the temperature of the sink is reduced by 62°C, its efficiency is doubled
| 2 |  |  | = 1 - | ...............(2) | ||
| 6 | T1 |
Solving (1) and (2) T2 = 372 K
T1 = 99°C = Temperature of source.
