non conducting ring of radius r and mass m is given charge q which is uniformly distributed over it it is kept in a magnetic field b which is spread in a circular region of the radius a as shown in the figure the centre of the ring coincides with the centre of the field is the magnetic field is suddenly switched off then the angular velocity of the ring will be
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non conducting ring of radius r and mass m is given charge q which is uniformly distributed over it it is kept in a magnetic field b which is spread in a circular region of the radius a as shown in the figure the centre of the ring coincides with the centre of the field is the magnetic field is suddenly switched off then the angular velocity of the ring will be
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