When is electric flux said to be positive,neg | vedclass

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(B) Electric flux $\Phi_E$ through a surface is defined by the integral $\Phi_E = \int \vec{E} \cdot d\vec{A} = \int E \cos 	heta \, dA$.$1$. Positiv

Vedclass · Accepted Answer

Positive when flux leaves the surface,negative when it enters,zero when net flux is zero.

Vedclass · Answer

(B) Electric flux $\Phi_E$ through a surface is defined by the integral $\Phi_E = \int \vec{E} \cdot d\vec{A} = \int E \cos 	heta \, dA$.$1$. Positive Flux: When the electric field lines leave the surface (outward flux),the angle $	heta$ between the area vector $\vec{A}$ and the electric field $\vec{E}$ is acute $(0^\circ \le 	heta  0$. Thus,the flux is positive.$2$. Negative Flux: When the electric field lines enter the surface (inward flux),the angle $	heta$ between the area vector $\vec{A}$ and the electric field $\vec{E}$ is obtuse $(90^\circ $3$. Zero Flux: When the electric field lines are parallel to the surface,the angle $	heta$ is $90^\circ$,making $\cos 90^\circ = 0$. Alternatively,if the net number of field lines entering equals the number leaving,the net flux is zero.

When is electric flux said to be positive,negative,or zero?

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