Find the potential at point a in the diagram below for charges Q 1 = +2.45 nC an

Question

Find the potential at point a in the diagram below for charges Q1 = +2.45 nC and Q2 = -2.45 nC. As shown, L = 4.60 cm.

What is the potential at point b?

How much work must be done by an external agent to bring a point charge q from infinity to point b?

Find the potential at point a in the diagram below for charges Q1 = +2.45 nC and Q2 = -2.45 nC. As shown, L = 4.60 cm. What is the potential at point b? How much work must be done by an external agent to bring a point charge q from infinity to point b?

Explanation / Answer

(a)Va= kq1/r+ kq2/r

Va=(9x109)(2.45x10-9)/(0.046) +(9x109)(-2.45x10-9)/(3*0.046)

Va=319.6 volts

(b) Vb= kq1/r+ kq2/r

V=(9x109)(2.45x10-9)/(0.046) +(9x109)(-2.45x10-9)/(0.046)

V=0volts

(c) W= Vb Q

W=0(q)

W=0

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