- #1
brianll
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I am having trouble understanding how the right hand rule works with lenz's law. Please explain
How do Lenz's Law and the right hand rule work together in electromagnetism?
- Thread starter brianll
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- hand Law Lenz Lenz law Right hand rule
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Homework Help Overview
The discussion revolves around the relationship between Lenz's Law and the right hand rule in the context of electromagnetism. Participants are exploring how these concepts interact, particularly in scenarios involving magnetic fields and induced currents.
Discussion Character
- Conceptual clarification, Assumption checking
Approaches and Questions Raised
- The original poster seeks clarification on the application of the right hand rule in conjunction with Lenz's Law. Some participants provide examples, such as the demonstration of a magnet falling through a copper pipe, to illustrate the concepts. Another participant questions how to determine whether the magnetic flux is increasing or decreasing in a given situation.
Discussion Status
The discussion is active, with participants sharing examples and raising questions about the underlying principles. While some guidance has been offered regarding specific demonstrations, there is no explicit consensus on the broader application of these concepts.
Contextual Notes
One participant notes that in their example, the magnetic flux is constant, which may influence the understanding of Lenz's Law in this context. There may be assumptions regarding the scenarios being discussed that are not fully articulated.
- #2
Delphi51
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Welcome to PF, brian. Lenz's law is an interesting and useful shortcut for working out the direction of a force. The hand rule is the basic and longer way to work out many of these situations. There isn't much more to be said unless you are interested in a specific situation.
The classic demo for Lenz' law is dropping a strong magnet through a copper pipe. It falls s l o w l y. Lenz' law says the magnetism induces a current in the pipe which acts to oppose the motion of the magnet.
A similar apparatus has a piece of copper pipe suspended by threads so it is free to move. When you pull the magnet out, Lenz' law says the copper pipe tries to hold on to the magnet and you can see this because the magnet pulls back on the pipe and makes it move. Here is the explanation of that effect using the hand rule:
The classic demo for Lenz' law is dropping a strong magnet through a copper pipe. It falls s l o w l y. Lenz' law says the magnetism induces a current in the pipe which acts to oppose the motion of the magnet.
A similar apparatus has a piece of copper pipe suspended by threads so it is free to move. When you pull the magnet out, Lenz' law says the copper pipe tries to hold on to the magnet and you can see this because the magnet pulls back on the pipe and makes it move. Here is the explanation of that effect using the hand rule:
- #3
brianll
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Hi Delphi. How do you figure out if the magnetic flux is increasing or decreasing?
- #4
Delphi51
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In the example, the magnetic flux is from a permanent magnet and is constant.
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