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एक चुम्बक का चुम्बकीय आघूर्ण 20 C.G.S मात्रक है । उसे 0*3 C.G.S मात्रक वाले चुम्बकीय क्षेत्र में स्वतन्त्रतापूर्वक लटकाया गया है । उसको से विक्षेपित करने के लिए C.G.S. पद्धति में कितना कार्य करना होगा ?

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सूत्र `W=MB(1-costheta)`
दिया है M= 20C.G.S. मात्रक, B= 0*3 C.G.S. मात्रक `theta=30^(@)`
सूत्र पर मान रखने पर ,
`W=20xx0*3(1-cos30^(@))`
`=6(1-(sqrt(3))/(2))=3(2-sqrt(3))` अर्ग।

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