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11 problems tagged with Electric Field
Intermediate
Electromagnetism › Electrostatics
P0851
Intermediate Electromagnetism › ElectrostaticsFind Unknown Charge from Net Field on Axis
In the rectangular coordinate system, three point charges sit on the $x$-axis. $Q_1 = 1.6 \times 10^{-8}$ C is at the origin $O$. The second charge $Q_2$ (unknown) is at $(x_2, y_2) = (3\ \mathrm{m}, 0)$. The third charge $Q_3 = 1.2 \times 10^{-8}$ C is at $(x_3, y_3) = (6\ \mathrm{m}, 0)$. The total electric field at $(x, y) = (8\ \mathrm{m}, 0)$ has magnitude $20.25$ N/C directed in the $+x$ direction.
Find the magnitude and sign of $Q_2$.
Electric Field
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