IIT JEE , AIEEE Forum - Physics , Electricity

kbanagar

please read carefully u will understand

ELECTRIC FIELD DUE TO DIPOLE
consider any dipole of moment
                  p=2aq
q=magnitude of either of the chg
2a = dist b/w the chgs

case1.              axial line

------(-q)------>-------(+q)--------m----->E_a
          |------2a--------|
                  |---------------d------|
let m be the pt on the axial where the electric field is in the direction of the axis of the dipole{directed frm -ve to +ve}

case 2. equatorial line

E_r< ------------- F < ---------- m
                                                                I
                                                                I
                                                                I
                          A          I           B
                                                   (-q)-------->---------(+q)
JOIN AM & BM
THE FIELD ARE
*Ea along MA due to -ve chg at A
*Eb along BM due to +ve chg at B

SO THE RESULTANT ELECTRIC FIELD IS ALONG MF

THEREFORE the direction is opp to the direction in the case i.e along the axis so the directions r antiparallel so the
angle b/w them is 180

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