A) \[\frac{1}{2}\]
B) 1
C) \[\frac{2}{3}\]
D) 2
Correct Answer: C
Solution :
Magnetic field at any point lying on the current carrying straight conductor is zero. Here H1 = Magnetic field at M due to current in PQ. H2 = Magnetic field at M due to QR + magnetic field at M due to QS + magnetic field at M due to PQ \[=0+\frac{{{H}_{1}}}{2}+{{H}_{1}}=\frac{3}{2}{{H}_{1}}\] Þ\[\frac{{{H}_{1}}}{{{H}_{2}}}=\frac{2}{3}\]
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