A field in which the work done in a moving a body along closed path is zero is called________________?
Correct answer: B. conservative field
- A. electric field
- B. conservative field
- C. electromagnetic field
- D. gravitational field
Explanation
A conservative field has zero net work around every closed path, so the work depends only on the initial and final positions. Gravitational and electrostatic fields are examples of conservative fields, but the general name asked for is conservative field. Students may choose gravitational field because it is a familiar example rather than the defining term.
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About Work
Work is done when a force produces displacement, with its value determined by the component of force along the displacement. The topic covers positive, negative and zero work, work by variable forces from force-displacement graphs, and the connection between net work and change in kinetic energy.
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