Force generated by a solenoid on a moving steel ball bearing

The conversation discusses the need to find an equation for the force generated by a solenoid on a moving steel ball bearing, taking into account factors such as current, number of loops, and area of the solenoid. Despite searching through various sources and a previous discussion, the equation has not been found. The difficulty of calculating the interaction between magnets and magnetizable objects is also mentioned. In summary, the conversation focuses on the challenge of finding an equation for the force generated by a solenoid on a moving steel ball bearing and mentions the difficulty of calculating the interaction between magnets and magnetizable objects in general.
  • #1
thephysicsgod
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Hi, I want to find an equation for the force generated by a solenoid on a moving steel ball bearing given current, number of loops, area of the solenoid for a lab project. I've tried looking through many sources, but was unable to find anything. I also tried looking at this previous discussion https://www.physicsforums.com/threads/equation-for-f-using-flux-desnity-in-solenoid.328605/ but this is for a steel ball bearing that isn't moving. Any help would be greatly appreciated.
 
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  • #2
The motion will induce eddy currents, those are independent of the ferromagnetic reaction of the steel balls.
In general the interaction between magnets and magnetizable objects is very difficult to calculate.
 

1. How does a solenoid generate force on a moving steel ball bearing?

A solenoid is a coil of wire that carries an electrical current. When an electric current passes through the solenoid, it creates a magnetic field around the coil. This magnetic field can interact with the steel ball bearing, causing it to experience a force.

2. What factors affect the force generated by a solenoid on a moving steel ball bearing?

The force generated by a solenoid on a moving steel ball bearing is affected by several factors, including the strength of the electric current passing through the solenoid, the number of turns in the coil, and the distance between the solenoid and the ball bearing.

3. Can the direction of the force generated by a solenoid be changed?

Yes, the direction of the force generated by a solenoid on a moving steel ball bearing can be changed by reversing the direction of the electric current passing through the coil. This will also change the direction of the magnetic field, and therefore the direction of the force on the ball bearing.

4. How does the speed of the steel ball bearing affect the force generated by a solenoid?

The speed of the steel ball bearing can affect the force generated by a solenoid in two ways. First, a faster-moving ball bearing will experience a greater force from the magnetic field as it spends less time within the field. Secondly, the force generated by the solenoid may also cause a change in the speed of the ball bearing, as the two interact with each other.

5. Can a solenoid generate a net force on a stationary steel ball bearing?

No, a solenoid can only generate a force on a moving steel ball bearing. This is because the force is created by the interaction between the magnetic field and the motion of the ball bearing. If the ball bearing is stationary, there is no motion to interact with the magnetic field and therefore no force is generated.

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