A charge - 1.3 * 10-5 C is fixed on the x-axis at 7 m, and a charge 1 * 10-5 C is fixed on the y-axis at 4 m. Calculate the magnitude of the resultant electric field E~ at the origin. Answer in units of N/C.

Question

Aaron Jackson

Physics

28 July, 21:31

A charge - 1.3 * 10-5 C is fixed on the x-axis at 7 m, and a charge 1 * 10-5 C is fixed on the y-axis at 4 m. Calculate the magnitude of the resultant electric field E~ at the origin. Answer in units of N/C.

+5

Answers (1)

Know the Answer?

Meredith Goodman · Answer 1

6104 N/C.

Explanation:

Given:

k = 8.99 * 10^9 Nm2/C^2

Qx = 1.3 * 10^-5 C

rx = 7 m

Qy = 1 * 10-5 C

ry = 4 m

E = F/Q

= kQ/r^2

Ex = (8.99 * 10^9 * 1.3 * 10^-5) : 7^2

= 2385.1 N/C.

Ey = (8.99 * 10^9 * 1.0 * 10^-5) : 4^2

= 5618.75 N/C

Eo = sqrt (Ex^2 + Ey^2)

= sqrt (3.157 * 10^7 + 5.69 * 10^6)

= 6104 N/C.