# Dipole - the calc. seems a bit illogical though correct

1. Apr 15, 2013

### exuberant.me

I was reading the calculation for calculating the electric field due to a dipole at any point P at a distance x from the center of the dipole.

the way they have written the calc. seems a bit illogical

they have broken p into two components pcosθ and psinθ and applied E = kp/r3

Now,

E = Ex + Ey = (kpcosθ)/r3i + (kpsinθ)/r3j

but that would give the net field along some other direction..

it should rather only be

E = Ex = (kpcosθ)/r3

If someone can explain..!!

2. Apr 15, 2013

### Staff: Mentor

Why? The electric field has both an x- and a y-component.

3. Apr 15, 2013

### exuberant.me

i got it cleared at last... actually there was a different problem i faced.. but could not express it here...
btw.. i got it cleared by looking carefully..
they have done the right thing.. for first one it lies on the axial line and for second component it lies on equitorial plane.. i could not focus on this thing... thanks a lot.. !!