What is the Relationship Between Solenoids and Magnetic Bars?

In summary, the conversation discusses the relationship between solenoids and magnets, and how the direction of current determines the direction of magnetic field lines. It is also mentioned that a solenoid can have a north and south pole, similar to a magnet. The conversation also touches on the concept of a bar magnet inside a solenoid and how the magnetic field of the coil can affect the bar magnet's movement. The term "electromagnet" is suggested as a better term for a solenoid.
  • #1
superslow991
78
1
Trying to understand solenoids and magnets a little better but have some questions
Solenoids usually create magnetic fields when a current runs through them. Also the direction of the current determines how the magnetic field lines direction. Also the solenoid, similar to a magnet will then have a north pole and south pole?

But for the bar magnet, the north end of the bar attracts to the south end of the bar? still sort of clueless on this part

Also what about a bar magnet inside a solenoid? something like this: https://gyazo.com/a17ed72e9e32b199eb0ebf9e4bc2c8cf

Are the field lines going in the same direction for both solenoid and magnetic bar? also then density of the lines, how can i determine that? Any help is appreciated.
 
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  • #2
superslow991 said:
Trying to understand solenoids and magnets

then you need to understand what a solenoid is
a solenoid doesn't describe the inductor coil, rather it usually describes a specific device, usually with a moveable metal core may or may not be magnetised within a coil, common use is for latching doors etc

So the better term you want is electromagnet
superslow991 said:
Solenoids usually create magnetic fields when a current runs through them

yes

superslow991 said:
Also the direction of the current determines how the magnetic field lines direction. Also the solenoid, similar to a magnet will then have a north pole and south pole?

yes and yes

superslow991 said:
But for the bar magnet, the north end of the bar attracts to the south end of the bar? still sort of clueless on this part

the south end of another magnet bar or other shaped magnet
superslow991 said:
Also what about a bar magnet inside a solenoid? something like this: https://gyazo.com/a17ed72e9e32b199eb0ebf9e4bc2c8cf

The magnetic field of the coil will likely force the bar magnet out one end or the other, depending on polaritiescheers
Dave
 
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Related to What is the Relationship Between Solenoids and Magnetic Bars?

1. What is a solenoid?

A solenoid is a coil of wire that produces a magnetic field when an electric current is passed through it. It is often used in electronic devices and electromechanical systems.

2. What is a magnetic bar?

A magnetic bar is a piece of metal that has been magnetized, creating a north and south pole. It can be used to create a magnetic field and attract or repel other magnetic objects.

3. How does a solenoid work around a magnetic bar?

When an electric current is passed through a solenoid, it creates a magnetic field. When the solenoid is placed around a magnetic bar, the magnetic field of the solenoid interacts with the magnetic field of the bar, causing the bar to be either attracted or repelled depending on the direction of the current.

4. What are the practical applications of a solenoid around a magnetic bar?

Solenoids around magnetic bars are commonly used in electromechanical devices such as speakers, electric motors, and relays. They can also be used in medical imaging equipment, particle accelerators, and magnetic levitation trains.

5. How can the strength of the magnetic field around a solenoid and magnetic bar be increased?

The strength of the magnetic field can be increased by increasing the number of turns in the solenoid coil, increasing the current passing through the solenoid, and using a stronger magnetic bar. The distance between the solenoid and magnetic bar can also affect the strength of the field.

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