Work done in bringing a charge from infinite.

AI Thread Summary
To calculate the work done in bringing a 4μC charge from infinity to point P, the forces exerted by the three charges at the vertices of the triangle must be considered. The relevant equations include W=fd for work and Coulomb's law to determine the force between charges. The concept of electric potential is crucial, as it relates to potential energy and the work done in moving the charge. Understanding how potential energy changes when moving a charge in an electric field is essential for solving the problem. The discussion emphasizes the need to connect these concepts to find the total work done.
Dodgers31296
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Homework Statement


3 charges, A,B, and C are located at the vertices of an equilateral triangle. Point P is at the center of the triangle, and is 8 cm from each charge. Charge A is +7 μC. Charge B is +6 μC. Charge C is -10μC. If a 4μC charge is brought from infinite to point P, how much work was done in moving this charge to point p.


Homework Equations


W=fd
F= Kq1q2/r2


The Attempt at a Solution


I think you're supposed to use w=fd. And i can get the force with coulombs law, but i don't understand the charge being brought from infinite.
 
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Dodgers31296 said:

Homework Statement


3 charges, A,B, and C are located at the vertices of an equilateral triangle. Point P is at the center of the triangle, and is 8 cm from each charge. Charge A is +7 μC. Charge B is +6 μC. Charge C is -10μC. If a 4μC charge is brought from infinite to point P, how much work was done in moving this charge to point p.

Homework Equations


W=fd
F= Kq1q2/r2


The Attempt at a Solution


I think you're supposed to use w=fd. And i can get the force with coulombs law, but i don't understand the charge being brought from infinite.
How is electric potential related to potential energy?

How is the change in potential energy related to work done?
 
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