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A DEFLECTION MAGNETOMETER IS SET IN A TAN A POSITION WHEN A SMALL MAGNET
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A DEFLECTION MAGNETOMETER IS SET IN A TAN A POSITION WHEN A SMALL MAGNET IS PLACED AT 20cm FROM THE NEEDLE THE DEFLECTION IS 30*. AT WHQAT DISTANCE THE MAGNET SHOULD BE KEPT SO THAT DEFLECTION BECOMES 60*?????????????????????/











