Question

How does the electric flux electric field enclosing a given area enclosed by the charge is doubled

Answer 1

Electric flux will remain Constant

Electric flux φ = E.ΔS

where ΔS is the area element.

Now when ΔS = 2ΔS

then φ = E.2ΔS

or, φ = 2E.ΔS

thus doubling the area will double the flux.

But in the case given in question ,the guassian surface area enclosing the charge is doubled then in such a case the flux will remain unchanged.

and electric field E is halved.

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Answer 2

electric flux is directly proportional to the magneticfield
so we can double the flux by doubling the field or current or potential difference.
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