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A thin rod of uniformly distributed total charge Q lies along the x-axis, from x =...

A thin rod of uniformly distributed total charge Q lies along the x-axis, from x = 0 to x = a. What is the y-component of the electric field at a distance y along the y-axis (where y is not equals to 0)? Show all your workings from first principles

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Answer #1

To find the electric field due to the rod-

1) Consider a rod along x axis and find the smallest electric field dE due to a small part of length dx at a distance x from the origin which varies from 0 to a.

2) since the electric field due to a particle charge = kq/(rxr) in this case we find the distance of point P from dx and then accordingly calculate the dE

dE 0 Let us constde ndof mgth a Consfoleu a Small paut d at a distance 0 Ruom tlu orian which hau Cl

Now to calculate the y-component of the electric field we find out that the y-component of the dE = dE cos theta where they = angle between electric field and y-axis.

We then integrate the value of dEcos theta with respect to x from 0 to a in order to calculate the y-component of dE.

y- dt Cose ん ouau 2 2-七 Ol 2-1 2

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