Question:
In a cyclic process, work done by the system is
In a cyclic process, work done by the system is
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In a cycle the internal energy change is zero, so W = Q.
Updated On: Oct 1, 2026
- zero.
- equal to the heat given to system.
- more than the heat given to system.
- independent of heat given to system.
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept
Internal energy is a state function. After one complete cycle the system is back in its initial state, so \(\Delta U = 0\).
Step 2: Apply the first law
\[ Q = \Delta U + W = W \]
So the net work done by the system equals the net heat given to the system. This is (B).
It is not zero in general (A), and it cannot exceed the heat supplied (C), since that would violate energy conservation. It is not independent of the heat (D).
Final Answer:
Work done equals the heat given to the system, option (B). \[ \boxed{W = Q} \]
Internal energy is a state function. After one complete cycle the system is back in its initial state, so \(\Delta U = 0\).
Step 2: Apply the first law
\[ Q = \Delta U + W = W \]
So the net work done by the system equals the net heat given to the system. This is (B).
It is not zero in general (A), and it cannot exceed the heat supplied (C), since that would violate energy conservation. It is not independent of the heat (D).
Final Answer:
Work done equals the heat given to the system, option (B). \[ \boxed{W = Q} \]
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