A) proportional to \[a\]
B) proportional to\[{{a}^{2}}\]
C) proportional to \[\frac{1}{a}\]
D) equal to zero
Correct Answer: D
Solution :
From Biot Savants law magnetic field at point R due to a straight wire \[B=\frac{{{\mu }_{0}}}{4\pi }\frac{i\,\Delta \,\sin \theta }{{{r}^{2}}}\] but \[\theta =0\] \[\therefore \] \[B=0\]You need to login to perform this action.
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