Using the simulation at http://phet.colorado.edu/sims/charges-and-fields/charges

Question

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.)

same sign but different magnitudes; closer to the larger chargeopposite sign and different magnitudes; closer to the smaller chargesame sign but different magnitudes; closer to the smaller chargeopposite sign and different magnitudes; closer to the larger chargesame sign and magnitude; equidistance to the two chargesopposite sign but same magnitude; equidistance to the two charges

Explanation / Answer

in case of opposite sign of cahrges in between the charges the fields add up and never be zero

So the charges must have same sign

So the answers are

same sign but different magnitudes; closer to the larger charge

same sign and magnitude; equidistance to the two charges

Related Questions

Navigate

• Browse (All)
• Browse U
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.