Assertion A : The work done by the electrostatic force is zero when a point charge moves in a circular path around another charge. Reason R : The dot product of force and displacement vectors gives work done.

Question

Assertion A : The work done by the electrostatic force is zero when a point charge moves in a circular path around another charge. Reason R : The dot product of force and displacement vectors gives work done., Both Assertion and Reason are true and Reason is the correct explanation of Assertion., Both Assertion and Reason are true but Reason is NOT the correct explanation of Assertion., Assertion is true but Reason is false., Assertion is false but Reason is true.

MARKS App · Accepted Answer

When the force is acting at right angle to the direction of motion of charge, then the work done is zero. W = F d cos 90 ° W = 0 The electrostatic force is radially inwards when a point charge moves in a circular path around another charge. Therefore, the electrostatic force acts at right angle to the direction of motion of the charge. Hence, work done is zero.

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