(a) Consider an equilateral triangle, inscribed in a circle of radius a, with a point charge q...
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(a) Consider an equilateral triangle, inscribed in a circle of radius a, with a point charge q at each vertex. The electric field is zero (obviously) at the center, but (surprisingly) there are three other points inside the triangle where the field is zero. Where are they? [Answer: r = 0.285 a—you’ll probably need a computer to get it.]
(b) For a regular n-sided polygon there are n points (in addition to the center) where the field is zero.16 Find their distance from the center for n = 4 and n = 5. What do you suppose happens as n→∞?
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