An electric dipole is formed from ±1.00nc charges spaced 3.00 mm apart. the dipole is at the origin, oriented along the x-axis. what is the electric field strength at the points?

a) (x, y) = (12.0 cm, 0 cm)
b) (x, y) = (0 cm, 12.0 cm)

1. 31.25 N/c

2. 15.625 N/c

Explanation:

Dipole moment of the dipole, p = q*d where d is the separation distance and q is charge

Substituting d with 3 mm which is 0.003 m and q with 1*10^{-9}

A) at (x,y) = (12.0 cm, 0 cm)

so, at 12 cm on x axis

Electric filed due to dipole on its axis,

  where r is x axis point in meters hence 0.12 m and taking k for axial line which is

(b) at (x,y) = (0 cm, 12.0 cm)

Electric filed due to dipole on equatorial line,

NB: This formula is different from the one in part (a) because here we consider the equatorial line

car a and b are moving in opposite directions

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