# Determine the point at which the electric field is zero.

Determine the point( other than infinity) at which the electric field is zero.

* ---------- *

One point particle denoted Q1 = -2.50e-3 C and Q2 = 6.00 e-3 C
the distance of separation is 1.00 m..
I am not sure how to determine R, s.t. my Electric field is Zero.

georgeh said:
Determine the point( other than infinity) at which the electric field is zero.

* ---------- *

One point particle denoted Q1 = -2.50e-3 C and Q2 = 6.00 e-3 C
the distance of separation is 1.00 m..
I am not sure how to determine R, s.t. my Electric field is Zero.

Do you know what R is?

We are suppose to determine a distance which will produce an electric field that is zero. I happen to choose R..maybe that was a bad letter to represent a variable.

Oh no. R is fine. I asked you what $R$ is, because $R$ should be a scalar (ie the distance) from something. Now $R$ could be the distance from anything, but would probably be the distance from the one of the charges.

For example if you had this configuration below

(-q)---------------(q)

|<----- 1m -------->|

Then if you wanted the distance from (-q) called R, you would have:

R<------- (-q)---------------(q)

Now the distance from (q) would be R+1m

do you see why it's important?

doin this question now myself, honestly doesnt make much sense to me to have an electrice field equal to zero unless we added another charge partical to cancel out.

Born2bwire