North and south poles of a circular magnetic field - Physics Forums
2011年8月9日 · The north and south poles in a circular magnetic field play a crucial role in determining the direction of the magnetic field lines. The direction of the magnetic field lines determines the direction in which a compass needle will point, and also determines the direction of the Lorentz force acting on a charged particle within the field. 5.
How do you magnetize a circular magnet? - Physics Forums
2016年6月3日 · Well, let me redefine the magnet I need, it has to be a toroid circular donut-shaped magnet, that is a single piece, that does not contain any creases or weld/glue points :P But most importantly, it must have either a clockwise or counter-clockwise magnetic field, and it must be a permanent magnet, an electromagnet simply couldn't work for my ...
Can You Create a Circular Magnet with Circular Magnetisation?
2012年2月14日 · The strength of a circular magnetised magnet can vary depending on the size and material of the magnet. However, in general, they can have a stronger magnetic field compared to traditional magnets. Some circular magnetised magnets can have a flux density of up to 1.4 Tesla, which is significantly higher than the Earth's magnetic field (0.00005 ...
Copper wire attached to the terminals of a cell - Physics Forums
2010年1月25日 · A strong circular magnet, 12 mm in diameter, is attached to the side of the cell. The interaction between the current in the wire and the magnetic field of the magnet causes the wire to levitate i.e. _____+ l l [s n] l____ - The dashed and straight lines represents the copper wire attached to the 2 terminals, with a magnet attached in the ...
How do you magnetize a circular magnet? | Page 2 - Physics Forums
2016年5月26日 · Part Toon. For applying a magnetic field to a cylindrical magnet, you can just put the magnet inside the cylindrical solenoid. The magnetic field runs all throughout the inside of the solenoid in the direction of along its axis. The wire is wound many times around the solenoid, typically 20-30 loops or more per inch.
How do you magnetize a circular magnet? | Page 3 - Physics Forums
2016年6月26日 · The "link" that my2cts provides is interesting. It also details the difficulty of creating the magnetic fields ## B ## in excess of ## B= 1 weber/m^2 ## that would be necessary to change the direction of magnetism of a permanent magnet.
How Is Terminal Velocity Achieved by a Ring Falling Through a …
2017年3月24日 · A thin, circular aluminium ring that is co-axial with the magnet falls through the magnetic field. By finding an expression for the current in the ring when it is falling at the speed v, or otherwise, determine the terminal velocity of the ring if the magnetic flux density at the circumference of the ring is 2.00T, and the ring has mass 2.66 x ...
Can a Circular Magnetic Field Accelerate Charged ... - Physics Forums
2009年8月2日 · A circular magnetic field is a type of magnetic field that has a circular shape. It is created by a current flowing through a wire or a coil, and it can also be generated by a permanent magnet. It is characterized by having field lines that are circular and concentric around the source of the field. 2. How is a circular magnetic field created?
Understanding Induced Voltage: Circular Coil & Permanent Magnet
2008年7月8日 · Understanding Induced Voltage: Circular Coil & Permanent Magnet. In summary, the induced voltage and current in the loop will be zero in situations B and D, where the South pole of the magnet is facing the loop and the direction of the magnet's velocity is out of the North pole. This is due to Lenz law, which states that a change in magnetic ...
How Does a Bar Magnet Oscillate? - Physics Forums
2009年10月26日 · In conclusion, the oscillation of a bar magnet is a result of the interplay between its own magnetic field and the Earth's magnetic field. The period of this oscillation can be calculated using the equation T= 2*pi*sqrt (I/mB), where I is the moment of inertia of the magnet, m is its mass, and B is the Earth's magnetic field.