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

[lking226]

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!

 

[berkeman]

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

??

 

[lking226]

v is velocity of the rod when it is moved across the magnet.

 

[lking226]

or a solenoid? i know this has something to do with solenoids...

 

[berkeman]

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.