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College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300

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BuyFindarrow_forward

College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300
Textbook Problem

Two small identical conducting spheres are placed with their centers 0.30 m apart. One is given a charge of 12 × 10−9 C, the other a charge of −18 × 10−9 C. (a) Find the electrostatic force exerted on one sphere by the other. (b) The spheres are connected by a conducting wire. Find the electrostatic force between the two after equilibrium is reached, where both spheres have the same charge.

(a)

To determine
The electrostatic force between the two spheres.

Explanation

Given info: The spheres have charges q1=12×109C and q2=18×109C are separated by a distance r=0.30m .

Formula to calculate the electrostatic force between the two spheres is,

F=ke|q1||q2|r2

  • ke is the Coulomb constant.

Substitute 8.99×109N.m2/C2 for ke , 12×109C for q1 , 18×109C for q2 and 0

(b)

To determine
The electrostatic force between the two spheres when they are connected by a conducting wire.

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