Electric charges of 1muC, -1muC and 2muC...

Electric charges of `1muC`, `-1muC` and `2muC` are placed in air at the corners A, B and C reepectively of an equilateral triangle ABC having length of each side 10cm. The resultant force on the charge at C is

A

`0.9N`

B

`1.8N`

C

`2.7N`

D

`3.6N`

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