A Charge Q Is Spread Uniformly Along the Circumference of a Circle

question 17

Multiple Choice

A charge Q is spread uniformly along the circumference of a circle of radius R. A point particlewith charge q is placed at the center of this circle. The total force exerted on the particle q can be calculated by Coulomb's law:

• A) just use R for the distance
• B) just use 2R for the distance
• C) just use 2 \(\pi\)R for the distance
• D) result of the calculation is zero
• E) none of the above

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