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## Homework Statement

Find the x-component of the electric field

at the origin due to the full arc length

for a charge of 3.8 μC and a radius of

1.9 m. The value of the Coulomb constant

is 8.98755 × 109 N · m2/C2.

## Homework Equations

E = kq/r^2

dq = q dθ

λ = Q/ (R θ)

## The Attempt at a Solution

I said E = kq/r^2

And so Ex = kq/r

^{2}* sinθ

and dEx = k*dq/r

^{2}* sinθ

and dq = λ ds

ds = R dθ

λ = q/s

so dq = Q/θ dθ

I get kq/r

^{2}∫sinθ/ θ dθ

But when I input the answer from this integral (from the calculator) the answer is wrong.