subbu
1. A charge of +3.5 µC is placed on the x axis at x = +0.55 m, while a charge of -15 µC is placed at the origin.
(a) Calculate the magnitude and direction of the net electric field on the x-axis at x = +0.8 m.
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Order Paper Now(b) Determine the magnitude and direction of the force that would act on a charge of – 8.0 µC if it was placed on the x axis at x = + 0.8 m.
Solution:
a) The electric field from a point charge is given by E = k|q|/r^2
E points towards a – charge and array from a + charge.
Both electric field points in the same direction so we just add them together
E (net) =
(8.99*10^9 Nm^2/C^2 * 3.5*10^-6 C)/ 0.55^2 + (8.99*10^9 Nm^2/C^2 * 15*10^-6 C)/ 0.8^2
E (net) = 2.9* 10^5 N/C +x direction
b) ?
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