A small permanent magnet is located on the x-axis with the center at <15,0,0>cm. The magnet’s North pole is at location <14.5, 0, 0>cm and the South pole is at location <15.5, 0, 0>cm. A current loop is placed in the y-z plane, such that its center is at the origin. It has a radius R=3cm and has a current of 0.6A. Knowing that the magnetic field at the orgin is <0,0,0>T, calucate the magnetic moment of the permanent magnet. Viewing the current loop from the permanent magnet’s perspective, what is the direction of the conventional current in the loop, clockwise or counter-clockwise?
To calculate the magnetic moment of the permanent magnet, we need to use the formula:
magnetic moment = magnetic field x area
Given that the magnetic field at the origin is <0,0,0>T, and assuming the area is perpendicular to the magnetic field, the magnetic moment will be zero. This means that the permanent magnet does not have a magnetic moment.
Now, let's determine the direction of the conventional current in the loop from the perspective of the permanent magnet. This can be done using the right-hand rule for current.
Place your right hand with the fingers pointing in the direction of the current flow in the loop. Your thumb will then point in the direction of the magnetic field created by the loop.
Since the magnetic field at the origin is <0,0,0>T, which means there is no magnetic field, we can conclude that the current in the loop does not create a magnetic field that interacts with the permanent magnet. Therefore, the direction of the conventional current in the loop is not relevant in this case.