Question

$h2_pointC$

A third point charge q₃ = 3.4 μC is now positioned along the y-axis at a distance d = 7.2 cm from q₁ as shown. What is E_x(P), the x-component of the field produced by all 3 charges at point P?

Two point charges (q₁ = -3.5μC and q₂ = 8.7 μC) are fixed along the x-axis, separated by a distance d = 7.2 cm. Point P is located at (x,y) = (d,d).

Answer 1

For X component of all electric feild on point P

Ex = Ex1 + Ex2 + Ex3

Ex = - k q1 /( $\sqrt{2}$ d)² * cos45 + 0 + k q3 /d²

( due to point charge q2 electrick feild will be in only y direction so Ex2 = 0)

Ex = - 9*10⁹ * 3.5 *10^-6 /( $\sqrt{2}$ *0.034²) cos45 + 9*10⁹ * 3.4 *10^-6 /(0.034²)

Ex = (-13.62 + 26.47 ) *10⁶

Ex = 12.85 *10⁶ N/C

answer