Lessons

Eamcet Physics
2 nd Year : Unit 3.2 ( Magnetic Effects of Current And Magnetism ) - Electro Magnetism

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Q.

An infinitely long conductor PQR is bent to form a right angle as shown. A current I flows through PQR. The magnetic field due to this current at the point M is B1. Now another infinitely long straight conductor QS is connected to Q so that the current is I/2 in QR as well as in QS, the current in PQ remaining unchanged. The magnetic field at M is now B2. The ratio B1/B2 is given by

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Correct choice: C

Explanation:

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