Question

A wire runs left to right and carries a current in the direction _________. What is the direction of the magnetic field at point z?

1) left
2) right
3) into the screen
4) out of the screen

Answer 1

In Physics, when a wire along the y-axis carries current in the +y-direction, the magnetic field at a point on the +x-axis is directed into the page.

Step-by-step explanation:

The subject of this question is Physics, and it relates to the magnetic field created by an electric current in a wire. Using the right-hand rule, where the thumb points in the direction of the current and the fingers show the direction of the magnetic field, we can determine the magnetic field direction around the wire. When a wire along the y-axis carries current in the +y-direction, and considering a point on the +x-axis near the wire, the direction of the magnetic field at that point is into the page. Consequently, the magnetic field created by an electric current in a long straight wire is directed into the page on the right side of the current, and out of the page on the left side.