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Two Parallel Currents

Two thin long...

Question

Two thin long wires carry currents $I_{1}$ and $I_{2}$ along x-and y-axes respectively as shown in figure. Consider the points only in x-y plane.

A

Magnetic field is zero at least at one point in each quadrant

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B

Magnetic field can be zero somewhere in the first quadrant

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C

Magnetic field can be zero somewhere in the second quadrant

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D

Magnetic field is non-zero in second quadrant

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Solution

The correct options are
B Magnetic field can be zero somewhere in the first quadrant
D Magnetic field is non-zero in second quadrant
In first and third quadrants, direction of magnetic field is opposite due to the two wires.
So, magnetic field can be zero only in first and third quadrants not in second and fourth.

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