Effect of current induced by rod magnet

In summary, a rod magnet rolled down a lined rectangular solenoid inclined at a 45 degree angle will not experience any braking or acceleration due to the induced current. This is because both magnetized ends are at the same axial position in the solenoid at any given time.
  • #1
Lesnick
8
0
If you had a lined retangular section solenoid inclined at a angle of 45 deg and you rolled a rod magnet ( just fits inside the retagular section) down it. Would the current induced in the solenoid brake or accelerate the rod magnet.
 
Engineering news on Phys.org
  • #2
Lesnick said:
If you had a lined retangular section solenoid inclined at a angle of 45 deg and you rolled a rod magnet ( just fits inside the retagular section) down it. Would the current induced in the solenoid brake or accelerate the rod magnet.

Welcome to the PF.

I'm not sure that I understand the geometry that you are describing. Also, what is the solenoid wiring connected to? Is there a load resistor, is it shorted end-to-end, or is it open circuit? Could you maybe post a sketch/drawing? I'm assuming the bar magnet has N at one end and S at the other end, right?
 
  • #3
yep the question isn't clear..
 
  • #4
There are several things going on here. The final answer is: no braking and no acceleration.

Assume a solenoid wound around a non-conducting rectangular form sloped at 45 degrees. A long magnetized rod magnetized end to end pulled or pushed through the solenoid will induce voltage pulses in the coil. If the ends of the solenoid are connected to a load, there will be a retarding force due to induced current. However, if a short rod magnetized end to end and rolling down the solenoid, will not induce a voltage, nor any retarding force. This is because both magnetized ends are at the same axial position of the solenoid at any instant in time.

Bob S
 

FAQ: Effect of current induced by rod magnet

What is the effect of current induced by a rod magnet?

The effect of current induced by a rod magnet is the creation of an electromagnetic field. This is caused by the movement of electrons in a conductor, such as a wire, in response to the magnetic field produced by the rod magnet. This phenomenon is known as electromagnetic induction.

How does the strength of the rod magnet affect the induced current?

The strength of the rod magnet directly affects the induced current. A stronger magnet will produce a stronger magnetic field, resulting in a larger induced current. This relationship is described by Faraday's law of electromagnetic induction.

Can the direction of the induced current be reversed?

Yes, the direction of the induced current can be reversed by changing the direction of the magnetic field or by changing the direction of the movement of the conductor. This is known as Lenz's law, which states that the induced current will flow in a direction that opposes the change in the magnetic field.

What factors can affect the amount of current induced by a rod magnet?

The amount of current induced by a rod magnet can be affected by several factors, such as the strength of the magnetic field, the speed of movement of the conductor, and the angle at which the conductor cuts through the magnetic field. Additionally, the material and length of the conductor can also impact the induced current.

What are some real-life applications of current induced by rod magnets?

Current induced by rod magnets has many practical applications, including generators, motors, and transformers. It is also used in devices such as headphones and speakers, where the changing magnetic field induces a current in the conductor, producing sound waves. Electromagnetic induction is also the basis for wireless charging technology.

Similar threads

Replies
6
Views
2K
Replies
10
Views
6K
Replies
6
Views
445
Replies
4
Views
3K
Replies
41
Views
5K
Replies
2
Views
1K
Replies
5
Views
503
Replies
12
Views
1K
Back
Top