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Electric field is the electrostatic forc...

Electric field is the electrostatic force per unit charge acting on a vanishingly small test charge placed at that point. It is a vector quantity and the electric field inside a charged conductor is zero. Electric flux `phi` is the total number of electric lines of force passing through a surface in a direction normal to the surface when the surface is placed inside the electric field.
`phi=ointvecE.vec(ds)=q/epsilon_0`
If `ointvecE.vec(ds)=0` over a surface, then

A

the electric field inside the surface and on it is zero.

B

the electric field inside the surface is necessarily uniform.

C

the number of flux lines entering the surface must be equal to the number of flux lines leaving it.

D

all charges must necessarily be outside the surface.

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