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#### flamethrower20

**Need help with "charges" question please!**

please help! this must be taught tomorrow in class, and this is my first year teaching. How can I explain it to my students?

Q: What point charges, all having the same magnitude, would you place at the corners of a square (one charge per corner), so that both the electric field and the electric potential (assuming a zero reference value at infinity) are zero at the center of the square? Account for the fact that the charge distribution gives rise to both a zero field and a zero potetial. Explain Thoroughly.

A: ?