Electromagnetism problem-ΣE on a point

[cotsiospower]

Homework Statement

Hi. I need help with the problem attached. I need to find the ΣE of the point and the direction angle... All information needed are on the attachment...


2. Homework Equations [

The Attempt at a Solution

There is no attempt since the teacher said nothing relevant... :(

 

[gneill]

Homework Statement

Hi. I need help with the problem attached. I need to find the ΣE of the point and the direction angle... All information needed are on the attachment...


2. Homework Equations [

The Attempt at a Solution

There is no attempt since the teacher said nothing relevant... :(

If the teacher hasn't stated anything relevant, then there's always the textbook

What formulas have you learned regarding electric charges?

 

[cotsiospower]

the only thin i found is: E=(k*|q|)/r*r
where k=9*10^9
Any idea?

 

[gneill]

the only thin i found is: E=(k*|q|)/r*r
where k=9*10^9
Any idea?

That is an expression that gives you the magnitude of the electric field due to a point charge (q) at some distance r. It's useful, and is almost right for what you need here.

A closely related expression gives the force that acts between two charges separated by distance r. Multiply the field that the above expression gives you by a second charge, say Q, and you get the force that each charge exerts on the other.

At this point I would suggest that you check your text or even investigate on the web the concept of "the force between electric charges". You will also need to learn about force vectors and the addition of vectors. These are some basic concepts there that you will need in order to solve this problem.

 

[asteriatic]

Hello,

The ΣE, or sum of electric fields, at a point can be found by adding together all the individual electric fields at that point. This can be done by using the formula ΣE = ∑E, where ∑E represents the sum of all the electric fields. To find the direction angle, you can use the formula tanθ = Ey/Ex, where Ey and Ex represent the y and x components of the electric field, respectively.

To solve this problem, you will need to first determine the individual electric fields at the point given in the attachment. This can be done by using the formula E = kQ/r^2, where k is the Coulomb's constant, Q is the charge, and r is the distance between the point and the source of the electric field. Once you have calculated the individual electric fields, you can add them together using the formula ΣE = ∑E.

To determine the direction angle, you will need to use the formula tanθ = Ey/Ex, where Ey and Ex are the y and x components of the electric field, respectively. You can find these components by using the formula Ey = E sinθ and Ex = E cosθ, where θ is the angle between the electric field and the x-axis.

I hope this helps you solve the problem. Good luck!