What is the Sign of Induced Voltage in Each Rotor Segment?

BlackMelon
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Homework Statement


I want to know the minus/plus sign of induced voltage of each rotor segment. Like in file no.3, equation 4-19, why (vxB)•l is not equal to eab instead?

Homework Equations


equation 4-19 and 1-45

The Attempt at a Solution


I was searching on this book, but found nothing.[/B]

Thank You
 

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BlackMelon said:

Homework Statement


I want to know the minus/plus sign of induced voltage of each rotor segment. Like in file no.3, equation 4-19, why (vxB)•l is not equal to eab instead?

Homework Equations


equation 4-19 and 1-45

The Attempt at a Solution


I was searching on this book, but found nothing.[/B]

Thank You

Can you type this out? Your pictures are hard to see.
 
Thread closed. @BlackMelon, I agree with the previous poster that the images are too unclear to read. Please start a new thread, with equation 4-19 typed out.
 
There are two things I don't understand about this problem. First, when finding the nth root of a number, there should in theory be n solutions. However, the formula produces n+1 roots. Here is how. The first root is simply ##\left(r\right)^{\left(\frac{1}{n}\right)}##. Then you multiply this first root by n additional expressions given by the formula, as you go through k=0,1,...n-1. So you end up with n+1 roots, which cannot be correct. Let me illustrate what I mean. For this...
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