- #1
Miike012
- 1,009
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In my book it says that the electric field (E) is equal to the following
E = -dV/dx <0
where V = Volatage and x = position
However if you look in the paint doc on one of my homework problems you will see that
E>0
They say that E = dV/dx = Δv/Δx (where Δx = d).
So E = Δv/Δx > 0 (because E is UNIFORM therefor dV/dx = Δv/Δx)
Questions:
1. When should I use the equation E = -dV/dx?
2. Why did they not use E = -dV/dx?
3. Is E a vector in this equation? Hence the neg sign indicates direction
E = -dV/dx <0
where V = Volatage and x = position
However if you look in the paint doc on one of my homework problems you will see that
E>0
They say that E = dV/dx = Δv/Δx (where Δx = d).
So E = Δv/Δx > 0 (because E is UNIFORM therefor dV/dx = Δv/Δx)
Questions:
1. When should I use the equation E = -dV/dx?
2. Why did they not use E = -dV/dx?
3. Is E a vector in this equation? Hence the neg sign indicates direction