As the choices indicate, you need to distinguish the two sides of the junction. And don't forget that the conventional current flow is opposite to the electron flow.Aishikdesto said:
That depends on what the word "joined" connotes. If they have been just kept in contact, should any electrochemical reaction occur?gneill said:
Yes, I'd think so. The metals have different electronegativity, different "standard electrode potentials". Galvanic corrosion comes to mind. I am the first one to admit that I am not an expert in this area, but I remember the terms from high school and college chemistryWrichik Basu said:
The doubt I have is that the question implies it is related to the applied current. I think I have come across this effect before on this forum.gneill said:Yes, I'd think so. The metals have different electronegativity, different "standard electrode potentials". Galvanic corrosion comes to mind. I am the first one to admit that I am not an expert in this area, but I remember the terms from high school and college chemistry
It looks like the same principle as this one:gneill said:Yes, I'd think so. The metals have different electronegativity, different "standard electrode potentials". Galvanic corrosion comes to mind. I am the first one to admit that I am not an expert in this area, but I remember the terms from high school and college chemistry
This would imply that the current ##I## in the copper is greater than the current ##I## in the iron. This isn't correct under steady-state conditions. Can you see why the currents must be the same? What can you say about the current density ##j##?Aishikdesto said:
I'm reasonably sure my interpretation in post #8 is the right one. TSny seems to agree.Charles Link said:
Yes, I agree. Somehow I overlooked post #8. My post was fairly redundant.haruspex said:
At the junction of a composite wire, the charges are typically distributed evenly between the different materials that make up the wire. This means that the charges are shared between the materials and can move freely within the wire.
The charge is distributed according to the properties of the materials that make up the composite wire. For example, if one material has a higher conductivity than the other, it will have a larger share of the charge.
Yes, the charge distribution in a composite wire can change if the properties of the materials or the external conditions, such as temperature and pressure, change. This can affect the flow of current in the wire.
The nature of charge at the junction of a composite wire can greatly affect its conductivity. If the charges are evenly distributed and can move freely, the wire will have a higher conductivity. However, if the charges are not evenly distributed or are restricted in their movement, the conductivity will be lower.
The nature of charge at the junction of a composite wire can be influenced by various factors, such as the type of materials used, their properties, and external conditions like temperature and pressure. Additionally, the way the wire is constructed and connected can also affect the charge distribution.
