Uneven distribution of charge on a ring problem

[Ahmed Farhan]

1.

2. I'm totally lost on this problem. Tried guessing in several ways but couldn't come up with the right answer.3. Since I was totally mesmerized by this problem, I need someone to solve it and provide explanation of critical steps of the process. Can someone help me?

 

[kuruman]

It is against the rules of this forum to provide solutions. Please follow the template and post the relevant equations. Start from the equations given in Section 26-4. Read and understand section 26-4 and see how you can modify that example to what you have here.