The Attempt at a Solution
how i did was that i consider the two negative currents flowing through two drills ... and let current from the original wire is out of plane
so on first drill mag field will be towards left (field by original wire at its center is 0)
as after second drill , current density remains same and area dec ... so current also dec.
now the field due to new line will be perpendicular to line joining its center ... so field at center shall inc ... its not the answer
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