- #1
jaus tail
- 615
- 48
Hi,
I'm struggling with source-free RL Circuit derivation.
In the books in the right side diagram they've reversed polarity of inductor to get equation:
V(r) = - V(L)
But why?
I checked google and everywhere they had put inductor with positive sign upwards.
Here is what I think--
In left diagram, inductor is acting as a load, so the point where current enters is positive.
But in right diagram, inductor is a current source, so the point where the current leaves should be positive.
The resistance on right is load. So using KVL we get V(r) = V(L)
Where am I wrong? How to reach the equation--V(r) = -V(L)
V(r) is voltage across resistance on right side.
V(L) is voltage across inductor.
I'm struggling with source-free RL Circuit derivation.
In the books in the right side diagram they've reversed polarity of inductor to get equation:
V(r) = - V(L)
But why?
I checked google and everywhere they had put inductor with positive sign upwards.
Here is what I think--
In left diagram, inductor is acting as a load, so the point where current enters is positive.
But in right diagram, inductor is a current source, so the point where the current leaves should be positive.
The resistance on right is load. So using KVL we get V(r) = V(L)
Where am I wrong? How to reach the equation--V(r) = -V(L)
V(r) is voltage across resistance on right side.
V(L) is voltage across inductor.