Joint Entrance Examination/2000 Screening/Q009 Magnetic field ratios in two different cases


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Original Question by Dharav talk

Here's the question...

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 H1. 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 H2 . The ratio H1/H2 is given by... 300px

  • (A) 1/2
  • (B) 1
  • (C) 2/3
  • (D) 2

Posted by Dharav talk 04:23, 18 August 2009 (UTC)


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