A Q L = -12 C charge is placed on the x-axis at x = - 0.1 m. A Q R = 12 C charge

Question

A QL = -12 C charge is placed on the x-axis at x = - 0.1 m. A QR = 12 C charge is placed at x = +0.1 m. (for all answers below assume that the unit vector x^ points toward positive x, and y^points towards positive y.).

Part A

What is the x-component of the electric field at x = 0 m and y =0.1 m?

Express your answer using three significant figures.

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Part B

What is the y-component of the electric field at x = 0 m and y =0.1 m?

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Part C

What is the x-component of the electric field at x = 0 m and y = -0.1 m?

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Part D

What is the y-component of the electric field at x = 0 m and y = -0.1 m?

Explanation / Answer

r = sqrt(0.1^2+0.1^2) = 0.141 m

ELx = -K*QL*xL/r^3

ELy = -k*QL*y/r^3

ERx = -k*QR*XR/r^3

ERy = +k*QR*y/r^3

Ex =ELx+ERX= (2*9*10^9*12*10^-6*0.1)/0.141^3

partA

Ex = -7705421.73 N/C

partB

Ey = 0

part (C)

ELx = -K*QL*xL/r^3

ELy = +k*QL*y/r^3

ERx = -k*QR*XR/r^3

ERy = -k*QR*y/r^3

Ex =ELx+ERX= (2*9*10^9*12*10^-6*0.1)/0.141^3

part(C)

Ex = -7705421.73 N/C

partD

Ey = 0

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