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Force applied to an electric charge by two other electric charges by two charges

작성자 Uploader : atom 작성일 Upload Date: 2019-10-01변경일 Update Date: 2020-02-29조회수 View : 141

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The force acting between two electric charges having charge amounts q1 and q2 and distance r (Law of the Coulomb)

FE = k*q1*q2/r^2

k : constant = 9*10^9 N-m^2/C^2
q1, q2 : charge amount (C)
r : distance between two charges (m)

The above equation is expressed as the following when the charge amount is in μC and the distance is in cm.

FE = 90*q1*q2/r^2

When three charges q1, q2 and q3 are placed in a peripheral triangle shape as shown in the figure, the electric power generated in charge q1 due to q2 and q3 located on the x-axis can be obtained as follows.
No Image

□ FE12 : Force acting between q1 and q2

※ q1, q2, q3 in μC
※ x, y in cm



□ FE13 : Force acting between q1 and q3



□ cosθ between FE12 and FE13



□ Resultant force of  FE12 and FE13


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