Copper wire magnetic force help

In summary, the magnetic force in copper wire plays a crucial role in generating electric currents by interacting with free electrons. While it does not directly affect the conductivity of the wire, it can cause electromagnetic interference that can be minimized through shielding. The strength of the force can be increased by increasing current, using a stronger magnet, or increasing the number of coils in the wire. The length and thickness of the wire indirectly affect the magnetic force by affecting resistance. Real-world applications of copper wire and magnetic force include electrical wiring, motors, generators, transformers, electronic devices, and magnetic levitation trains, MRI machines, and speakers.
  • #1
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Question Details:
In the figure the top wire is 1.1 -diameter copper wire and is suspended in air due to the two magnetic forces from the bottom two wires. The current is 50 in each of the two bottom wires.

Calculate the required current flow in the suspended wire.
i have been working on it for a long t,me.if one who knows a solution appear, i will be happy
 

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  • #2
Show what you've done so far and where you are getting stuck.
 
  • #3


I would first like to clarify that the term "magnetic force" is not accurate in this scenario. The phenomenon at play here is known as the "magnetic field" which is created by the flow of electric current through the bottom wires. This magnetic field exerts a force on the suspended wire, causing it to remain suspended in air.

To calculate the required current flow in the suspended wire, we can use the formula for magnetic force, which is given by F = BIL, where B is the magnetic field, I is the current, and L is the length of the wire.

In this scenario, we know the diameter of the suspended wire (1.1 inches) and the current in the bottom wires (50 amps). However, we do not have enough information to calculate the magnetic field. We would need to know the distance between the bottom wires and the suspended wire, as well as the permeability of the medium (air) to determine the magnetic field.

Once we have the value for the magnetic field, we can use the formula to calculate the required current in the suspended wire. Without this information, it is not possible to provide a specific answer.

I would also like to add that as a scientist, it is important to use accurate terminology and to be precise with units and measurements when discussing scientific concepts. This ensures clear communication and avoids confusion.
 

1. What is the role of magnetic force in copper wire?

The magnetic force in copper wire is responsible for the movement of electrons, which generates an electric current. The force is created when a magnetic field interacts with the free electrons in the wire, causing them to move in a specific direction.

2. How does the magnetic force affect the conductivity of copper wire?

The magnetic force does not directly affect the conductivity of copper wire. However, it can induce currents in nearby conductors, which can interfere with the flow of electricity in the wire. This phenomenon is called electromagnetic interference (EMI) and can be minimized by shielding the wire.

3. Can the strength of the magnetic force in copper wire be increased?

Yes, the strength of the magnetic force can be increased by increasing the current in the wire or by using a stronger magnet. Additionally, the number of coils in the wire can also affect the strength of the force.

4. How does the length and thickness of copper wire affect the magnetic force?

The length and thickness of copper wire do not directly affect the magnetic force. However, the length of the wire can affect the resistance, which in turn can affect the flow of electricity and the strength of the magnetic force. Thicker wires generally have lower resistance and can carry more current, resulting in a stronger magnetic force.

5. What are some real-world applications of copper wire and magnetic force?

Copper wire and magnetic force have numerous real-world applications. Some common examples include electrical wiring in buildings, motors, generators, transformers, and electronic devices. Magnetic force is also used in magnetic levitation trains, MRI machines, and speakers.

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