Problem 23.9: Equation for the electric field

Please wait for the animation to completely load.

Four point charges of equal strength but two different polarities are arranged on the corners of a square as shown. The strength of each charge is measured in nC and can be varied using the slider. You can mouse-down to read the magnitude of the field at any point in the animation (position is given in meters and electric field strength is given in newtons/coulomb). Restart.

Find a formula for the electric field midway between charge 2 and 3 (indicated by the small black dot) as a function of the strength of the charges. Include a vector diagram that also shows the direction of the resultant field.

Problem authored by Chuck Bennett and Wolfgang Christian.

Physlets were developed at Davidson College and converted from Java to JavaScript using the SwingJS system developed at St. Olaf College.

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Open Source Physics - EJS Modeling
Physlet Physics
Physlet Quantum Physics
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