The magnitude of electric force on 2µc charge placed at the center O of two equilateral triangles each of side 10 cm, as shown in figure is P. If charge A, B, C, D, E & F are 2µc, 2µc, 2µc, –2µc, – 2µc, –2µc respectively, then P is:
Text Solution
Verified by ExpertsThe correct answer is:
D
The given figure shows force diagram for charge at O due to all other charges with r = 
cm
F net = 2F + 4F cos 60º = 4F
= 
= 36 × 4 × 300 × 10 –3 N = 43.2 N. (Towards E)
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