A small current element of length \[d\ell \]and carrying current is placed at (1, 1, 0) and is carrying current in \['+z'\] direction. If magnetic field at origin be B\[{{\vec{B}}_{1}}\] and at point (2, 2, 0) be \[{{\vec{B}}_{2}}\] then:

\[{{\vec{B}}_{1}}=-\,2{{\vec{B}}_{2}}\]

\[{{\vec{B}}_{1}}={{\vec{B}}_{2}}\]

\[\left. \left| {{{\vec{B}}}_{1}} \right. \right|=\left| 2\left. {{{\vec{B}}}_{2}} \right| \right.\]

\[{{\vec{B}}_{1}}=-{{\vec{B}}_{2}}\]

A small current element of length \[d\ell \]and carrying current is pl

1.	A small current element of length \[d\ell \]and carrying current is placed at (1, 1, 0) and is carrying current in \['+z'\] direction. If magnetic field at origin be B\[{{\vec{B}}_{1}}\] and at point (2, 2, 0) be \[{{\vec{B}}_{2}}\] then:
A.	\[{{\vec{B}}_{1}}={{\vec{B}}_{2}}\]
B.	\[\left. \left\| {{{\vec{B}}}_{1}} \right. \right\|=\left\| 2\left. {{{\vec{B}}}_{2}} \right\| \right.\]
C.	\[{{\vec{B}}_{1}}=-{{\vec{B}}_{2}}\]
D.	\[{{\vec{B}}_{1}}=-\,2{{\vec{B}}_{2}}\]
Answer» D. \[{{\vec{B}}_{1}}=-\,2{{\vec{B}}_{2}}\]