A charge of 0.8 coulomb is divided into ...

A charge of 0.8 coulomb is divided into two charges `Q_1` and `Q_2`. These are kept at a separation of 30 cm. the force on `Q_1` is maximum when

`Q_1=Q_2=0.4C`

`Q_1~~0.8C,Q_2` NEGLIGIBLE

`Q_1` negligible, `Q_2~~0.8C`

`Q_1=0.2C, Q_2=0.6C`

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