Question

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

167237_8b0929fac2f942f5aa1e5b2b085ec9c4.png

A
y=2x
B
y=x
C
y=x
D
y=(x/2)
Solution
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Along the dashed line, B1 and B2 are in opposite directions. If the line has slope 1.00,
then r1=r2 and B1=B2. So, Bnet=0
Hence, slope of the line dashed line is -1.
y=x as the line passes through the origin making intercept zero.

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