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  4. Two very long, straight wires carrying, currents as shown in figure. Find all locations where the net magnetic field is zero.

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Q. Two very long, straight wires carrying, currents as shown in figure. Find all locations where the net magnetic field is zero.Physics Question Image

Moving Charges and Magnetism

Solution:

Along the dashed line, $\vec{B}_{1}$ and $\vec{B}_{2}$ are in opposite directions. If the line has slope $-1.00$, then $r_{1}=r_{2}$ and $B_{1}=B_{2}$. So, $B_{\text {tot }}=0$

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