The figure shows a long wire bent in the middle to form a right angle. The magnitudes of the magnetic fields at Points P, Q, R and S are B1, B2, B3 and B4 respectively. The wire and the circumference of the circle are co-planar.
B1 = B2 = B3 = B4
B1 = 2 B2
B3 = 2 B4
None of these
If we find:
B1 at P is:
B2 at Q is:
B3 at R is:
B4 at S is:
So, here, B1 = B2 = B3 = B4.
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