Two point charges 4 and 92 of 2 x 10-8C and
- 2 x 10°C respectively are placed 0.4 m apart.
Calculate the electric field at the centre of the line
joining the two charges.
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E = E1 + E2
E = kq/d^2
d = 0.4m; q1 = 2x10^-8C; q2 = -2x10^-8C
k=8.988 x 10^9
substitute in formula and find
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