Two long, straight, current-carrying wires lie in the plane of the computer scre

Question

Two long, straight, current-carrying wires lie in the plane of the computer screen, one with a current flowing down and the other with a current flowing to the right. The magnitudes of the currents are equal. (The wires are insulated, so there is no current flowing from one wire to the other.) What is the direction of the total magnetic field at the point marked X? This point is equal distance below the horizontal wire and to the right of the vertical wire. Question 8 options: A) Right, the the plane of the screen. B) Right and Up, in the plane of the screen. C) Up, in the plane of the screen D) Left and Up, in the plane of the screen E) Left, in the plane of the screen F) Left and Down, in the plane of the screen G) Down, in the plane of the screen H) Right and Down, in the plane of the screen I) Into the plane of the screen J) Out of the plane of the screen K) Clockwise, in the plane of the screen L) Counter Clockwise, in the plane of the screen M) Zero. There is no direction because the quantity in the question has zero magnitude

Explanation / Answer

so by RHR the wire going to the right will make a B into the page and the wire going down will make a B out of the page since the distances are the same these B will cancel so net B=0 so M)

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