A) 0°
B) 90°
C) 180°
D) 45°
Correct Answer: B
Solution :
The magnetic field due to small element of conductor of length is given by \[dB=\frac{{{\mu }_{0}}}{4\pi }\frac{Idl\sin \theta }{{{r}^{2}}}\] This value will be maximum when \[\sin \theta =1=\sin 90{}^\circ \] or, \[\theta =90{}^\circ \]
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