ch24-p012 - 12. (a) The potential difference is VA VB = q 4...

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() 69 2 2 00 3 11 1 . 01 0 C 8 . 9 91 0Nm C 4 4 2.0 m 1.0 m 4.5 10 V. AB qq VV rr πε ⎛⎞ =−= × × ⎜⎟ ⎝⎠ =− × (b) Since V ( r ) depends only on the magnitude of
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