Three points charges of 1 C, 2C and 3C ...

Three points charges of `1 C, 2C` and `3C` are placed at the corners of an equilateral triangle of side 100 cm. Find the work done to move these charges to the corners of a similar equilateral triangle of side 50 cm.

`9.9 xx 10^19 J`

`6.9 xx 10^10 J`

`0`

`9.9 xx 10^10 J`

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