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. (A) Both (A) and (R) are collect and (R) is the correct explanation of (A) (B) Both (A) and (R) are correct but (R) is not the correct explanation of (A) (C) (A) is correct but (R) is not correct (D) (A) is not correct but (R) is correct

Tardigrade Admin · Accepted Answer

∵ Work done, W= F ⋅ s =F s cos θ work done is zero when force acts at right angle to the direction of motion of charges hence, W=F s cos 90°=0 . The work done by the electrostatic force is zero when a point charge moves in a circular path around another charge. Since, the electrostatic force acts at right angle to the direction of motion of the charges.

Q. 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 (A) and (R) are collect and (R) is the correct explanation of (A)

Both (A) and (R) are correct but (R) is not the correct explanation of (A)

(A) is correct but (R) is not correct

(A) is not correct but (R) is correct

Q. 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.