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19-21. Electric Field on Line Connecting Point Charges

# 19-21. Electric Field on Line Connecting Point Charges -...

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Electric Field on Line Connecting Point Charges (1) Consider the x -component of the electric field. Electric field at point P 1 : E = E 1 + E 2 = kq 1 (7m) 2 + kq 2 (3m) 2 = 1 . 47N / C + 12 . 0N / C = 13 . 5N / C . Electric field at point P 2 : E = E 1 + E 2 = kq 1 (3m) 2 - kq 2 (1m) 2 = 7 . 99N / C - 108N / C = - 100N / C . 2 0 1 3 2 4 5 6 7 x [m] 2 P 1 P q = +8nC 1 q =+12nC 8/1/2008 [tsl19 – 1/3]

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Electric Field on Line Connecting Point Charges (2) Four particles with charges of equal magnitude are positioned on a horizontal line in six different configurations. (a)
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Unformatted text preview: (b) (c) (d) (e) (f) Determine for each configuration the direction of the resultant electric field (left/right/zero) at the location indicated by × . 8/1/2008 [tsl16 – 2/3] Electric Field on Line Connecting Point Charges (3) • Is the unknown charge positive or negative? • What is the value of the unknown charge? (a) (b) ? 9nC 2m 3m 3m 2m 9nC E=0 E=0 ? + + 8/1/2008 [tsl17 – 3/3]...
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