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Is Electrostatic Force Conservative

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Positive and negative point charges of equal magnitude are kept at (0,0,a/2) and (0,0,-a/2), respectively. The work done by the electric field when another positive charge in moved from (-a,0,0) to (0,a,0) is A. Positive B. Negative C. Zero D. depends on the path connecting the initial and final position.

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Q. Positive and negative point charges of equal magnitude are kept at

(0, 0, \frac{a}{2})

(0, 0, \frac{- a}{2})

, respectively. The work done by the electric field when another positive point charge is moved from

(- a, 0, 0)

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Q. Two point charges

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- q

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(0, 0, d)

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respectively. What will be the electric field at point

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Q. A point charge q is rotated along a circle in an electric field generated by another point charge Q. The work done by the electric field on the rotating charge in one complete revolution is
(a) zero
(b) positive
(c) negative
(d) zero if the charge Q is at the centre, otherwise non-zero

Q. The lines of force of the electric field of a positive charge

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are shown in figure (a) and (b) below. Then:-

(a) The work done in moving a small positive charge (+

q_{0}

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(b) The work done in moving a small negative charge (−

q_{0}

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(c) In going from Q to P, the kinetic energy of a small negative charge (−

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(d) In going from B to A, the kinetic energy of a small negative charge (−

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Q. A point charge q moves from ‘P’ to ‘S’ along path PQRS in a uniform electric field E directied parallel to positive X-axis. The co-ordinates of the points P.Q.R and S are (a, b, 0), (2a, 0, 0), (0, –b, 0) and (0, 0, 0) respectively. The work done by field in the above process is given by

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