# Find electric field a distance P from a charged rod

## Homework Statement

The figure below shows a thin, vertical rod of length L with total charge Q. The indicated point P is a horizontal distance x from the one end of the rod. What is the electric field at point P. Express your answer in component notation in the two blanks below.

L = 5.0 cm, Q = 3.0 nC, and x = 3.0 cm.

kq/r^2

## The Attempt at a Solution

theta = arctan(5/3) = 59 deg
total charge = [(8.99x10^9)(3x10^-9)]/((0.03)^2) = 29966
x component = 29966cos59=15417

1.8/2 points

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Nevermind I just forgot to square the distance lol

Why am I only getting 1.8/2 points for 15417N/C??? is something incorrect?

this is so frustrating what is the sig figs ??

LOL IT WAS ROUNDED DOWN TO 15000

berkeman
Mentor
LOL IT WAS ROUNDED DOWN TO 15000
So you're good now?

isukatphysics69
So you're good now?
yes please see other thread I am stuck again on y component

SammyS
Staff Emeritus
Homework Helper
Gold Member

## Homework Statement

The figure below shows a thin, vertical rod of length L with total charge Q. The indicated point P is a horizontal distance x from the one end of the rod. What is the electric field at point P. Express your answer in component notation in the two blanks below.

L = 5.0 cm, Q = 3.0 nC, and x = 3.0 cm.

View attachment 230884

kq/r^2

## The Attempt at a Solution

theta = arctan(5/3) = 59 deg
total charge = [(8.99x10^9)(3x10^-9)]/((0.03)^2) = 29966
x component = 29966cos59=15417

1.8/2 points
This working of this problem is incorrect.