The work done by the spring force in a cyclic process is ______.
I. Zero
II. Positive
III. Negative

Correct option is C

The correct answer is (c) Only I.
In a cyclic process, the object attached to a spring returns to its initial position, which means the total displacement over one complete cycle is zero. Since work done is calculated as the product of force and displacement, and there is no net displacement in a complete cycle, the work done by the spring force is zero.
Information Booster: ● In a cyclic process, the net work done by conservative forces like spring force is zero. ● The spring force is a restoring force, meaning it acts to return the object to its equilibrium position. ● Work done by the spring can be positive or negative within parts of the cycle, but the total work over a full cycle is zero. ● The concept applies to all conservative forces in a cyclic process.
Additional Knowledge:
· (Option a) Only III: Incorrect; the net work done is zero, not purely negative.
· (Option b) Only II: Incorrect; the work done in a complete cycle is zero.
· (Option c) Only I: Correct; the total work done in a cyclic process is zero.
· (Option d) I, II, and III: Incorrect; only zero work is correct for a complete cycle.