The number of electric field lines crossing an area `DeltaS` is `n_(1)` when `Delta vec(S)
Channel: Doubtnut
Date: 2020-01-19

The number of electric field lines crossing an area `DeltaS` is `n_(1)` when `Delta vec(S)||vec(E )` while number of field lines crossing same area is `n_(2)` when `Delta vec(E )` makes an angle of `30^(@)` with `vec(E )`, then :