In the loops shown in figure, all curved sections are either semi-circles or quarter circles. All the loops carry same current. The magnetic fields at the centres have magnitudes\[{{B}_{1}}\], \[{{B}_{2}}\], \[{{B}_{3}}\], and\[{{B}_{4}}\] Then, which is correct?

\[{{B}_{1}}>{{B}_{4}}>{{B}_{3}}>{{B}_{2}}\]

\[{{B}_{1}}>{{B}_{2}}>{{B}_{3}}>{{B}_{4}}\]

\[{{B}_{3}}>{{B}_{4}}>{{B}_{1}}>{{B}_{1}}\]

\[{{B}_{4}}>{{B}_{1}}>{{B}_{2}}>{{B}_{3}}\]

In the loops shown in figure, all curved sections are either semi-circ

1.	In the loops shown in figure, all curved sections are either semi-circles or quarter circles. All the loops carry same current. The magnetic fields at the centres have magnitudes\[{{B}_{1}}\], \[{{B}_{2}}\], \[{{B}_{3}}\], and\[{{B}_{4}}\] Then, which is correct?
A.	\[{{B}_{1}}>{{B}_{2}}>{{B}_{3}}>{{B}_{4}}\]
B.	\[{{B}_{3}}>{{B}_{4}}>{{B}_{1}}>{{B}_{1}}\]
C.	\[{{B}_{4}}>{{B}_{1}}>{{B}_{2}}>{{B}_{3}}\]
D.	\[{{B}_{1}}>{{B}_{4}}>{{B}_{3}}>{{B}_{2}}\]
Answer» D. \[{{B}_{1}}>{{B}_{4}}>{{B}_{3}}>{{B}_{2}}\]