1.

The position of point from wire 'B', where net magnetic field is zero due to following current distribution.B(6)-----5 151216 cm6 cm(1) 6/7 cm(3) 18/17 cm(2) 12/7 cm(4) 16/7 cm(1) 4 cm(3) 8 cm(2) 2 cm(4) 12 cm​

Answer»
  • let consider POINT from b is X . THUS it will 6-x , by FORMULAE of magnetism ur ans will be x=30/7


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