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A massless and inextensible cord is wound round the circumference of a circular ring of mass M and radius R. The ring is free to rotate about an axis passing through its centre and perpendicular to its plane. A mass m is attached at the free end of the cord and is at rest. The angular speed of the ring when mass m has fallen through at height h is?
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(N+n) number of identical resistors each of resistance R is combined to get the minimum and maximum resistances, what is the ratio of the maximum to minimum resistance?
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.Five Charges of equal amount (Q) are placed at five corners of a regular hexagon of side 15 cm. What will be the value of sixth charge placed at sixth corner of the hexagon so that the electric field at the centre of hexagon is zero?
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A particle of mass m = 6 kg is moving with a uniform speed v = 3 m/sec in the XOY plane along the straight line Y = X - 4 . The magnitude of the angular momentum about origin is?
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