if a loop of wire is suspended between the poles of a magnet with its plane parallel to pole face what happens when direct current passes through it
Answers
Answer:
If the loop is in the exact “center plane” of the magnet, then the magnetic field lines going through it will be perfectly parallel to the magnet, and perpendicular to the wire. That means that the magnetic forces on the wire will be in the plane of the wire and will tend to expand or contract the loop, depending on which wah the current is going. If you look at the magnet “end on” from the North pole end, then the field lines cutting the wire will be aimed away from you, and counterclockwise current will compress the loop and clockwise current will expand it.
Precisely what happens will depend on whether the loop is stiff enough to resist those compressive forces. If it is, then the loop will just sit there and vibrate; if it’s not, then it will be deformed and might lose its planar nature - once it’s no longer in that plane the magnetic field lines will no longer be parallel to the magnet, and a lot of random things might happen.
If the loop isn’t on that center plane, then it will see magnetic field lines in the radial direction as well, and those will cause the loop to move axially along the magnet, again in an alternating back and forth way.
Hope this helps!
Explanation: