- #1

- 41

- 1

- Homework Statement
- A uniformly charged rod is positioned along the x-axis as shown in the figure. Calculate the electric field at a point P on the y-axis.

- Relevant Equations
- dq=lamda*dx

de=kdq/r^2

hello i would like to understand to something.

here is the drew

now for my question:

i was able to find Ey and here is my correct answer:

when i try to find Ex i didnt understand something, i found the correct answer but i need to put minus before and i want to know why?

here is my solution for Ex (the correct answer):

yes i know i didnt solve the integral becuase first i want to know why there is minus

here is the drew

now for my question:

i was able to find Ey and here is my correct answer:

when i try to find Ex i didnt understand something, i found the correct answer but i need to put minus before and i want to know why?

here is my solution for Ex (the correct answer):

yes i know i didnt solve the integral becuase first i want to know why there is minus