A long wire is bent into the shape PQRST as shown in the figure with Q – InterviewSolution

1.	A long wire is bent into the shape PQRST as shown in the figure with QRS being a semicircle with centre O and radius r. A current I flows through it in the direction P→Q→R→S→T. The net magnetic field at point O is
Answer» A long wire is bent into the shape PQRST as shown in the figure with QRS being a semicircle with centre O and radius r. A current I flows through it in the direction $P \to Q \to R \to S \to T$ . The net magnetic field at point O is

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