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A system has two charges qA =2.5 xx 10 ^...

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 charges and electric dipole moment of the system ?

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Here ` q_A =2.5 xx 10 ^(-7) C, q_B =-2.5 xx10 ^(-7) C ` and distance between them `2a=15-(-15) =30 cm =0.3 m `
` therefore ` Total charges of the system `=q_A +q_B =2.5 xx 10^(-7) +(-2.5xx 10^(-7) ) =0 .`
Electric dipole moment of the system `p=q.2a= 2.5 xx 10 ^(-7) xx0.3 =7.5 xx10 ^(-8) C-m `
The dipole moment is directed from charges `q_B ` towards charge `q_A ` i.e. along -z-axis..
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