Carnot Cycle

The correct answer is (C) :
Efficiency ,
Given : η = 50%

when η increases by 30% then,

The correct answer is (C) : Always less than the 1^st case

The correct answer is 42






= 42 g/minute

Step 1: Convert Celsius to Kelvin

The temperature of the hot reservoir is given as . Convert this to Kelvin:

Step 2: Use the Carnot Efficiency Formula

The efficiency of a Carnot engine is given by:

where is the temperature of the cold reservoir and is the temperature of the hot reservoir.

Step 3: Calculate the Initial Cold Reservoir Temperature

Initially, the efficiency is . So,

Step 4: Calculate the Cold Reservoir Temperature After the Increase

When the cold reservoir temperature is increased by , the new temperature is , and the efficiency becomes . So,

Step 5: Solve for

Conclusion: The value of is 62 K (Option 2).