Question
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Solving time: 4 mins
Suppose the spheres A and B in Exercise 1.12 have identical sizes. A third sphere of the same size but uncharged is brought in contact with the first, then brought in contact with the second, and finally removed from both. What is the new force of repulsion between A and B?
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Text solutionVerified
Distance between the spheres, A and B, r
Initially, the charge on each sphere,
When sphere A is touched with an uncharged sphere C, q/2 amount of charge from A will transfer to sphere C. Hence, charge on each of the spheres, A and C, is .
When sphere with charge is brought in contact with sphere with charge , total charges on the system will divide into two equal halves given as,
Hence, charge on each of the spheres, and , is .
Force of repulsion between sphere A having charge q/2 and sphere B having charge is
Therefore, the force of attraction between the two spheres is
Initially, the charge on each sphere,
When sphere A is touched with an uncharged sphere C, q/2 amount of charge from A will transfer to sphere C. Hence, charge on each of the spheres, A and C, is .
When sphere with charge is brought in contact with sphere with charge , total charges on the system will divide into two equal halves given as,
Hence, charge on each of the spheres, and , is .
Force of repulsion between sphere A having charge q/2 and sphere B having charge is
Therefore, the force of attraction between the two spheres is
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Question Text | Suppose the spheres A and B in Exercise 1.12 have identical sizes. A third sphere of the same size but uncharged is brought in contact with the first, then brought in contact with the second, and finally removed from both. What is the new force of repulsion between A and B? |
Updated On | Oct 23, 2023 |
Topic | Electric Charges and Fields |
Subject | Physics |
Class | Class 12 |
Answer Type | Text solution:1 Video solution: 6 |
Upvotes | 684 |
Avg. Video Duration | 10 min |