Electric Potential at Origin of Point Charges?

In summary, the conversation discusses the electric potential at the origin of the xy coordinate system due to two equal point charges situated along the x-axis. The formula for calculating electric potential is mentioned and it is clarified that voltages add up since they are energies. The conclusion is that the electric potential at the origin is not zero.
  • #1
freeofwork
44
0

Homework Statement



Two equal point charges of magnitude 4.0 μC are situated along the x-axis at x1=-2.0m and x2= 2.0m. What is the electric potential at the origin of the xy coordinate system?


Homework Equations



ΔV= Kc (q/r)

The Attempt at a Solution



Do voltages cancel each other out at the mid point or do they add up?
 
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  • #2
hi freeofwork! :smile:
freeofwork said:
Do voltages cancel each other out at the mid point or do they add up?

(can't they do both? :wink:)

voltage is (electric) potential energy per charge, and so can be positive or negative

energies add (as scalars), so voltages do also :smile:
 
  • #3
so its not zero right?
 

Related to Electric Potential at Origin of Point Charges?

1. What is a point charge voltage?

A point charge voltage is the electrical potential energy of a point charge at a specific location in an electric field. It is a measure of the work needed to move a unit of electric charge from an infinitely far distance to the location of the point charge.

2. How is a point charge voltage calculated?

The point charge voltage can be calculated using the equation V = kQ/r, where V is the voltage, k is the Coulomb's constant (9 x 10^9 Nm^2/C^2), Q is the charge of the point charge, and r is the distance between the point charge and the location where the voltage is being measured.

3. How does the distance affect the point charge voltage?

The point charge voltage is inversely proportional to the distance between the point charge and the location where the voltage is being measured. This means that as the distance increases, the voltage decreases, and vice versa.

4. What is the unit of measurement for point charge voltage?

The unit of measurement for point charge voltage is volts (V). This is the same unit used for other forms of voltage, such as for batteries and power outlets.

5. How is point charge voltage different from electric potential?

Point charge voltage is a specific type of electric potential, which is the amount of electric potential energy per unit of charge at a specific location in an electric field. Point charge voltage only applies to point charges, whereas electric potential can be calculated for any type of charge distribution.

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