Q.

A point charge ‘q’ is placed at the centre of one of the faces of cuboid PQRS as shown in the figure. If E.  ds  is electric flux through area ds. If value of E.  ds  over the surface QRUT is qkε0  and value of E.  ds  over the surface of PQRS is  Nqε0  , then   

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A point charge ‘q’ is placed at the centre of one of the faces of cuboid PQRS as shown in the figure. If ∫E→.  d s→  is electric flux through area ds. If value of ∫E→.  d s→  over the surface QRUT is qkε0  and value of ∫E→.  d s→  over the surface of PQRS is  Nqε0  , then