An infinitely long conductor PQR is bent to form a right angle. A current I flows at the point M is div.Now,another infinitely long straight conductor QS is connected at Q so that current I/2 in QR as well as in QS, the current in PQ remaining unchanged. Magnetic field at M is now H2. Ratio of div/H2 is... (a) 1/2 (b) 1 (c) 2/3 (d) 2 fig : M P--------Q S | | R
An infinitely long conductor PQR is bent to form a right angle. A current I flows at the point M is div.Now,another infinitely long straight conductor QS is connected at Q so that current I/2 in QR as well as in QS, the current in PQ remaining unchanged. Magnetic field at M is now H2. Ratio of div/H2 is... (a) 1/2 (b) 1 (c) 2/3 (d) 2 fig : M P--------Q S | | R