# electromagnetics problem

#### Reduan tonmoy

Dec 24, 2012
3
pls anyone help me by solving this math,

Problem:
Two point charge +2Q and -Q coulombs are located at (-1,0,0) & (1,0,0) respectively in free space. find
i. Electric field
ii.potential
in XY plane(i.e. z=0)

[Note: for simplify the calculation |Q|=1]

Last edited:

#### (*steve*)

##### ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
Moderator
Jan 21, 2010
25,510
OK, perhaps you can start by telling us what you can figure out for yourself.

#### Reduan tonmoy

Dec 24, 2012
3
sorry i can't understand ....

#### (*steve*)

##### ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
Moderator
Jan 21, 2010
25,510
If you don't understand, you need to go back to your teacher, notes, or text.

Surely you understand something?

We don't do people's homework for them, so you need to try and maybe we can help where you are stuck or tell you where you go wrong.

#### dprabhakar

Aug 1, 2013
4
I think ur question is incomplete but the formula used is E=kQ/r^2
where in this case r=2 units, K=8.854*10^-12
V=Er
take Q as both Q1 in one case & Q2 in other case

#### Reduan tonmoy

Dec 24, 2012
3
If you don't understand, you need to go back to your teacher, notes, or text.

Surely you understand something?

We don't do people's homework for them, so you need to try and maybe we can help where you are stuck or tell you where you go wrong.

and i solved this problem.i post that problem because of short time of submission, and within short time i wasn't sure at what point i have to go, for this reason i posted that problem. and sorry for disturbing you by posting unusual question.

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