The thermal energy reservoir from which heat is transferred to the system which works on heat engine cycle is called as

The thermal energy reservoir from which heat is transferred to the system which works on heat engine cycle is called as

a. source
b. sink
c. atmosphere
d. all of the above

Correct Answer : a. source

Explanation :

The thermal energy reservoir from which heat is transferred to the system which works on heat engine cycle is called as source and the thermal energy reservoir to which heat is rejected from the system is called as sink as shown in the diagram.