Two similar metal spheres are suspended ...

Two similar metal spheres are suspended by silk threads from the same point. When the spheres are given equal charges of `2 mu C` the distance between them becomes 6cm. If length of each thread is 5 cm, the mass of each sphere is (g=10 m/s2)

4 kg

3kg

`4/3 kg `

`1/3` kg

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