In the figure shown there is non conducting disc of mass M 2kg and radius R 4 m On its upper lower parts of circumference Q and

Question

In the figure shown there is non conducting disc of mass M 2kg and radius R 4 m On its upper lower parts of circumference Q and Q charge are uniformly attached such that liner charge density is The disc can freely rotate about a horizontal axis passing through O There is a uniform electric field E in the vertical direction such that QE mg If the disc is rotated by a small angle it performs S H M Its time period is given by T Q TR then p n is Take g O TELG 4 pr 22

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