Consider a point charge q = 0.81 C, point A at distance d 1 = 2.8 m from q , and

Question

Consider a point charge q = 0.81 C, point A at distance d1 = 2.8 m from q, and point B at distance d2 = 1.5 m. (a) If A and B are diametrically opposite each other, as in Figure (a), what is the electric potential difference VA - VB? (b) What is that electric potential difference if A and B are located as in Figure(b)?

(a) V Consider a point charge q = 0.81 ½C, point A at distance d1 = 2.8 m from q, and point B at distance d2 = 1.5 m. (a) If A and B are diametrically opposite each other, as in Figure (a), what is the electric potential difference VA - VB? (b) What is that electric potential difference if A and B are located as in Figure(b)?

Explanation / Answer

(a). If A and B are diametrically opposite each other, as in Figure (a), electric potential difference VA - VB = 0

electric potential difference VA - VB =  Kq(1/d1 - 1/d2 )

= 9*109*0.81* 10-6?*(1/2.8 -1/1.5)

= -2.2564 kV

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