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A plastic rod with linear charge density λ is bent into the quarter circle shown in (Figure 1). We want to find the electric field at the origin.

Express your answer in terms of the variables R, λ, unit vectors i^, j^, constant π, and permittivity constant ϵ0.

++
R
XXXX*X
++
X

1
(Enet)x -47²/0 (7) S/² ² cos 0 de, (Enct)y = 42 (à) Sõ
;
sin Ꮎ de

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