Physics

Problem

Point charges +2 µC and –18 µC are fixed 60 cm apart on a straight line in air. At which one of the following positions will the electric field be zero? (Distances are measured from the +2 µC charge.) a)

45\ \text{cm}

between the two charges b)

30\ \text{cm}

on the side extending beyond the

+2\,\mu\text{C}

charge, away from the

-18\,\mu\text{C}

charge c)

15\ \text{cm}

between the two charges d) No finite point along the line joining the two charges

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