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: if you use R for the distance if you use 2R for the distance if you use 2πR for the distance and the result of the calculation is zero none of the above

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: if you use R for the distance if you use 2R for the distance if you use 2πR for the distance and the result of the calculation is zero none of the above

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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: if you use R for the distance if you use 2 R for the distance if you use 2 π R for the distance and the result of the calculation is zero none of the above

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