COMEDK Exam 2012 Solved Paper

As two coils are mutually perpendicular, so the field produced by them will also be perpendicular to each other as shown

The two coils identical, so magnetic field,
B∝I
or

Bx

By

=

Ix

Iy

=

1

2

⇒By=2Vx
∴Bx=B, then By=2B
∴ Resultant field, BR=√Bx2+By2
=√B2+(2B)2
=√5B