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The potential at point C is given as VC = 0, and the potential at point D is calculated as VD = k(-q/L) + kq/3L = -2kq/3L. The potential difference VD - VC is expressed as -2kq/3L - 1/4πε₀(2q/3L). The work done is determined by the expression Q(VD - VC). Which statement is correct?

1. The potential at point C is VC = 0.
2. The potential at point D is VD = k(-q/L) + kq/3L = -2kq/3L.
3. The potential difference VD - VC is -2kq/3L - 1/4πε₀(2q/3L).
4. The work done is calculated as Q(VD - VC).

Correct answer: The work done is calculated as Q(VD - VC).

Solution

The work done is calculated as the product of the charge Q and the potential difference (VD - VC), which matches option D.

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