The Magnetic Field at Any Point in the Xy Plane $\pi$

question 3

Multiple Choice

The magnetic field at any point in the xy plane is given by , where is the position vector of the point, A is a constant, and is a unit vector in the +z direction.The net current through a circle of radius R, in the xy plane and centered at the origin is given by:

• A)" \(\pi\)AR²/\(\mu\)₀"
• B)"2 \(\pi\)AR/\(\mu\)₀"
• C)"4 \(\pi\)AR³/3\(\mu\)₀"
• D)"2 \(\pi\)AR²/\(\mu\)₀"
• E)" \(\pi\)AR²/2\(\mu\)₀"