Question: 5. A thin ring with radius R has charge q uniformly distributed over its length. It is brought near a head with unknown charge Q

5. A thin ring with radius R has charge q uniformly

5. A thin ring with radius R has charge q uniformly distributed over its length. It is brought near a head with unknown charge Q and mass m. The head is connected to the ceiling with a string. With the ring nearby, the string is in static equilibrium when it forms an angle Ewith the vertical. See figure. Find Q. The knowns are R, q, H, m, g and it... {15 points) -q_.-",-.I'._ string +--.: gravity I | .- direction

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