P25_076 - q x 2 4 q y = q 2 1 x 1 y which yields V = 187...

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76. We denote q =25 × 10 9 C, y =0 . 6m , x =0 . 8m ,w ith V = the net potential (assuming V 0as r →∞ ). Then, V A = 1 4 πε 0 q y + 1 4 πε 0 ( q ) x V B = 1 4 πε 0 q x + 1 4 πε 0 ( q ) y leads to V B V A =
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Unformatted text preview: q x 2 4 q y = q 2 1 x 1 y which yields V = 187 190 V....
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