If the electric flux entering and leavin

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Target Exam

CUET

Subject

Physics

Chapter

Electric Charges and Fields

Question:

If the electric flux entering and leaving an enclosed surface respectively are ϕ1 and ϕ2 then what is the electric charge inside the surface ?

Options:

(ϕ2 + ϕ1)ϵ₀

(ϕ2−ϕ1)/ϵ₀

(ϕ2+ ϕ1)/ϵ₀

(ϕ2−ϕ1)ϵ₀

Correct Answer:

(ϕ2−ϕ1)ϵ₀

Explanation:

Flux entering is due to negative charge and flux leaving is due to negative charge.

Net electric flux is (ϕ₂−ϕ₁).

Charge enclosed is q = (ϕ₂−ϕ₁)ϵ₀