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Q. Five point charges each having magnitude $q$ are placed at the corner of hexagon as shown in figure. Net electric field at the centre $O$ is $\vec{E}$. To get net electric field at $O$ be $6 \vec{E}$, charge placed on the remaining sixth corner should bePhysics Question Image

Electric Charges and Fields

Solution:

To obtained net field $6 E$ at centre $O$, the charge to be placed at remaining sixth corner is $-5 q$.
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