Which of the following is the action-at-distance force ?
(A) muscular force
(B) frictional force
(C) magnetic force
(D)mechanical force
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magnetic force
Action-at-a-distance forces are those types of forces that result even when the two interacting objects are not in physical contact with each other, yet are able to exert a push or pull despite their physical separation. Examples of action-at-a-distance forces include gravitational forces.
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The correct answer is option (C) magnetic force.
- Out of the given options, only magnetic force acts at a distance. All others are contact forces.
- The magnetic force is a consequence of the electromagnetic force, one of the four fundamental forces of nature, and is caused by the motion of charges.
- Two objects containing charge with the same direction of motion have a magnetic attraction force between them.
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