Class Management I Help Homework 1 Begin Date: 1/18/2018 2:00:00 PM- -Due Date:

Question

Class Management I Help Homework 1 Begin Date: 1/18/2018 2:00:00 PM- -Due Date: 1/30/2018 11:59:00 PM End Date: 1/31/2018 3:00:00 AM (7%) Problem 3: We have three identical metallic spheres A, B C Initially sphere A is charged with charge Q, while B and C are neutral. First, sphere A is brought into contact with sphere B and then separated from it. After that, sphere A is brought into contact with sphere C and then separated from it. Finally, sphere A is brought into contact with sphere B again, and then separated from it What is final charge of sphere A? Grade Summary 2 Potential 100 Submissions Attempts remaining 25% pe(attempt) detailed view Submit I give up Hints: 29. deduction per hint Hits remamag: 2 Feedback:2 deduction per feedback

Explanation / Answer

initially the charge of sphere A is Q

when it is contact with sphere B , then let half of the charge is trnasfered so both having same charge of Q/2

now Sphere A isn brought in contact with sphere C , then the charge transfered to C is half of the charge (Q/2)/2 = Q/4

now the charge of the sphere A is Q/4

again the sphere A is brought into contact with sphere B again , so the charge transfered from A to B so that the average charge remained in sphere A is ((Q/4)+(Q/2))/2 = 3Q/8

So the final charge remain on sphere A is 3Q/8

the answer is 3Q/8

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