question_answer

Two very long, straight, and insulated wires are kept at \[90{}^\circ \] angle from each other in xy-plane as shown in the figure. These wires carry currents of equal magnitude I, whose directions are shown in the figure. The net magnetic field at point P will be :        [JEE Main 8-4-2019 Afternoon]

A) Zero

B) \[\frac{+{{\mu }_{0}}I}{\pi d}(\hat{z})\]

C) \[-\frac{{{\mu }_{0}}I}{2\pi d}(\hat{x}+\hat{y})\]

D) \[\frac{{{\mu }_{0}}I}{2\pi d}(\hat{x}+\hat{y})\]

Correct Answer: A

Solution :

[a]

Magnetic field at point P