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Q.

A linear charge having linear charge density λ penetrates a cube diagonally and then it penetrates a sphere diametrically as shown. What will be the ratio of flux coming out of cube and sphere

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a

23

b

11

c

12

d

32

answer is C.

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Detailed Solution

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Flux coming out of the cube

ϕ1=λ⋅a3ε0........(i)

and from sphere

ϕ2=λ⋅2aε0.........(ii)

∴ ϕ1ϕ2=32

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