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

question 42

Multiple Choice

A charge Q is spread uniformly along the circumference of a circle of radius R.A point particle with 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)if you use R for the distance
• B)if you use 2R for the distance
• C)if you use 2\(\pi\)R for the distance
• D)and the result of the calculation is zero
• E)none of the above

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