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
Asked by prakriti12oct | 06 Oct, 2019, 11:29: PM
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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