A system has two charges `q_A = 2.5 xx 10^(-7)` C and `q_(B) = - 2.5 xx 10^(-7)` C located at points A:(0, 0, -15 cm) and B : (0, 0, + 15 cm), respectively. What are the total charge and electric dipole moment of the system ?

Explanation

Total charge of given system.
`q_(A) + q_(B) = -2.5 xx 10^(-7) + 2.5 xx 10^(-7) =0`
Electric dipole moment of given dipole,
`vecp = (2veca)q ={vecr_(+) - vecr_(-)}.q`
`=(vecr_(A) - vecr_(B))q`
`=(0,0, -0.15) - (0,0,0.15) (2.5 xx 10^(-7))`
`therefore vecp = (0,0, -0.3) (2.5 xx 10^(-7))`
`therefore p = 7.5 xx 10^(-8) Cm` (Along -Z axis)