Electric charges of 1mu C, -1 mu C and 2...

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

0.9 N

1.8 N

2.7 N

3.6 N

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