A line of charge extends along a \( \mathrm{X} \)-axis whose linear charge density varies direct...

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A line of charge extends along a \( \mathrm{X} \)-axis whose linear charge density varies directly as \( \mathrm{x} \). Imagine a spherical volume with its centre located on X-axis and is moving gradually along it. Which of the
\( P \) graphs shown in figure correspond to the flux \( \phi \) with the \( \mathrm{x} \) coordinate of the centre of the volume?
W.
(A) \( \mathrm{a} \)
(B) \( \mathrm{b} \)
(C) \( \mathrm{c} \)
(D) \( \mathrm{d} \)
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