Q. A current element of length $dl$ and carrying current $I$ in $+z$ direction is placed at $\left(\right.1,1,0\left.\right)$ . Let magnetic field at origin be $\overset{ \rightarrow }{B_{1}}$ and at point $\left(\right.2,2,0\left.\right)$ be $\overset{ \rightarrow }{B_{2} ,}$ then which of the following is correct?
NTA AbhyasNTA Abhyas 2020
Solution:
Magnitude of magnetic field will be same for both the points as they are located at equal distance from the wire. But the direction of magnetic field can be determined by right hand thumb rule.
