http://phet.colorado.edu/sims/charges-and-fields/charges-and-fields_en.html Usin

Question

http://phet.colorado.edu/sims/charges-and-fields/charges-and-fields_en.html

Using the simulation at http://phet.colorado.edu/sims/charges-and-fields/charges-and-fields_en.html (click the "show E-field" and "grid" in the green box at the bottom-right), determine if & when there will be an equilibrium point (i.e., a place where E = 0) and if so, where it will be. To create, say, a +2Q, put two + charges on top of one another. To remove a charge, drag it back to the "box" of charges. Because of the grid of E field arrows, you may need to move the charges around a bit to see what's really happening, or use the E field sensor. An equilibrium point will occur between two charges that have the__; the equilibrium point is___. (Select all that apply.) opposite sign and different magnitudes; closer to the larger charge opposite sign and different magnitudes; closer to the smaller charge opposite sign but same magnitude; equidistance to the two charges same sign but different magnitudes; closer to the larger charge same sign and magnitude; equidistance to the two charges same sign but different magnitudes; closer to the smaller charge

Explanation / Answer

same sign and magnitude; equidistance to the two charges.

same sign but different magnitudes; closer to the smaller charge.

only the above two options are correct.

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