Voltage Question: Find Potential Difference at x=4.0m, y=2.0m

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A 4.0μC charge is located at the origin of an xy coordinate system, and the task is to find the potential difference at the points x=4.0m and y=2.0m. The formula used for calculating voltage is V = k X q/r, resulting in an absolute voltage of 9.0 x 10^3. To determine the potential difference, the potentials at both points must be calculated and then subtracted. The order of subtraction is clarified as "A - B" when finding the difference between two points. Understanding the signs of the voltages is essential for accurately determining the potential difference.
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Homework Statement


A 4.0μC charge is situated at the origin of an xy coordinate system. What is the potential difference between the points x=4.0m and y=2.0m because of this charge?


Homework Equations



V = k X q/r

The Attempt at a Solution



So i got the absolute value of the voltage to be 9.0 X 103. Howver how do you know if the voltage is negative or positive?
 
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The question asks for the potential difference, so find the potential at 4.0m and at 2.0m and then take the difference.
 
gneill said:
The question asks for the potential difference, so find the potential at 4.0m and at 2.0m and then take the difference.

how do i know which voltage comes first in the difference?
 
freeofwork said:
how do i know which voltage comes first in the difference?

If asked the difference between A and B, I'd write "A - B".
 
thank you so much!
 
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