Designing a Lab to Find Constant Slope Using E=Blv Equation

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Homework Help Overview

The discussion revolves around designing a laboratory experiment to produce five data points that yield a constant slope using the equation for electromotive force (emf), E=Blv. The original poster seeks clarification on how to manipulate the variables involved and formulate a research question related to the experiment.

Discussion Character

  • Exploratory, Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants discuss the independent variables B (magnetic field) and v (velocity), and the need for methods to measure emf (E). Questions arise regarding the setup for varying B and v, as well as the formulation of the research question. Some participants express confusion about the terminology used in the original post.

Discussion Status

The discussion is ongoing, with participants seeking to clarify the original poster's intent and the specifics of the experiment design. Some guidance has been offered regarding the variables involved, but there is no explicit consensus on the approach or the research question at this time.

Contextual Notes

There is uncertainty regarding the definitions of the variables in the equation, as well as the practical aspects of measuring and manipulating B and v in the experiment. The original poster expresses feeling lost in the process.

lking226
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Homework Statement


I need to design a lab that will give me 5 points that produce a constant slope.


Homework Equations


I want to use the equation for emf E=Blv
I would re-arrange it to make E/Bv = l
Where B and v are my constantly increasing data points, E is measured by some sort of device, and l is my constant slope.

The Attempt at a Solution


I know my independent variables would be B and v, I would have different vlues for each of my 5 trials.
What would I use to produce and change the B and v?
What would I use to measure my E?
Also, I need help with my research question. So far I have "How long must a rod be to..." would the rest be ... to produce a constant emf? I know it has something to do with emf.


Please help, I'm completely lost!
 
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lking226 said:

Homework Statement


I need to design a lab that will give me 5 points that produce a constant slope.


Homework Equations


I want to use the equation for emf E=Blv
I would re-arrange it to make E/Bv = l
Where B and v are my constantly increasing data points, E is measured by some sort of device, and l is my constant slope.

The Attempt at a Solution


I know my independent variables would be B and v, I would have different vlues for each of my 5 trials.
What would I use to produce and change the B and v?
What would I use to measure my E?
Also, I need help with my research question. So far I have "How long must a rod be to..." would the rest be ... to produce a constant emf? I know it has something to do with emf.


Please help, I'm completely lost!

Why would a rod produce EMF (electromotive force or electromagnetic field?)?

And in your equation, are

B = magnetic field
V = voltage
E = Electric field

??
 
v is velocity of the rod when it is moved across the magnet.
 
or a solenoid? i know this has something to do with solenoids...
 
What in the world are you trying to ask us? We are not mind readers.

Please take some time, and re-ask your question and request for help.
 

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