A large 1 m by 1 m sheet conductor in the x-y plane carries a uniform current flowing in the x-direction.The current density is 1.7 A/cm.What is the direction of the magnetic field just above the center of the sheet at z = 2 mm (not close to any edges).
A)positive x-direction
B)negative x-direction
C)positive y-direction
D)negative y-direction
E)positive z-direction

Question

Quizplus · Accepted Answer

According to the right-hand rule and Ampère's law, the magnetic field above the sheet will circulate around the current. Since the current flows in the positive x-direction, the magnetic field just above the sheet will be in the negative y-direction.

A Large 1 M by 1 M Sheet Conductor in the X-Y