Three rigit rods are joined to form an e...

Three rigit rods are joined to form an equilaterla triangle ABC of side 1 m. Three particles carrying charges `20 muC` each are attached to the vertices of the triangle. The whole system is at rest in an inertial frame. The resultant force on the charged particle. A has the magnitude.

Zero

3.6 N

`3.6 sqrt(3)N`

7.2 N

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