Question

A straight section PQ of a circuit lies along the
X-axis from x = -a/2 to x = a/2 and carries a steady
current i. The magnetic field due to the section
PQ at a point X = + a will be
(1) Proportional to a
(2) Proportional to 2 a
(3) Proportional to 1/a
(4) Zero​

Answer 1

Answer:

the answer is 4) zero 0

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