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CBSE Class 12-science Answered

If it is in the north south direction the formula for tan b should be used and ans should be cube root 4 * 10^-2
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Asked by prakriti12oct | 06 Oct, 2019, 11:29: PM
answered-by-expert Expert Answer
Magnetic moment of short magnet is given as,  m /BH = 40 A m2 T-1
 
By neglecting the length l, because magnet is short, we have from theory of defletion magnetometer,
 
m/BH = (4π / μo ) ( d3 / 2 ) = 40
 
d3 = 20 × 10-7  or  d = 2 × 10-2 m
 
Hence magnet should be placed at 2 cm , north pole of magnet is pointing towards south
Answered by Thiyagarajan K | 07 Oct, 2019, 10:17: AM
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