Ring of radius R having uniformly distributed charge Q is mounted on a rod suspended by two identical strings as shown in fig. The tension in strings in equilibrium is T_0. Now a vertical magnetic field is switched on and the ring is rotated at constant angular velocity Omega. Find the maximum Omega with which the ring can be rotated if the strings can withstand a maxiumum tension (3T_0)/(2)

Ring of radius R having uniformly distributed charge Q is mounted on a

1.	Ring of radius R having uniformly distributed charge Q is mounted on a rod suspended by two identical strings as shown in fig. The tension in strings in equilibrium is T_0. Now a vertical magnetic field is switched on and the ring is rotated at constant angular velocity Omega. Find the maximum Omega with which the ring can be rotated if the strings can withstand a maxiumum tension (3T_0)/(2)
Answer» SOLUTION :`T_0 = (OMEGA QBR^2)/(D) or omega = (DT_0)/(QBR^2)`

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