Two polnt charges Q1- +4.10 nC and Q2--1.60 nC are separated by 45.0 cm (a) What

Question

Two polnt charges Q1- +4.10 nC and Q2--1.60 nC are separated by 45.0 cm (a) What Is the electric potential at a point midway between the charges? 479.4 Use the expression for the electric potential from each point charge to find the electric potential at the midpoint between the two charges. V (b) What is the potential energy of the pair of charges? 1.27-06x Calculate the electric potential from one charge at the location of the other charge. How is that electric potential related to the potential energy?3 What is the significance of the algebraic sign of your answer? Positive work must be done to separate the charges. O Negative work must be done to separate the charges. Need Help? RedMaster Submit Anawer Save ProgressPractice Another Version

Explanation / Answer

(A) distance of midpoint from both charge,

d = 45/2 = 22.5 cm = 0.225 m

V = k q1 / d + k q2 / d

= ( 9 x 10^9 / 0.225) (4.10 - 1.60)x10^-9

= 100 Volt

(B) PE = k q1 q2 / d12

= ( 9 x 10^9)(4.10 x 10^-9)(-1.60 x 10^-9)/0.45

= - 1.312 x 10^-7 J

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