- #1
Amr Elsayed
- 90
- 3
Good evening everyone.
I have a misconception regarding self inductance. I know that back emf induced in an inductor starts with the same value of the original voltage source and then keeps decreasing to reach zero. I also know how this is related to the derivative of current with respect to time, though I fail to understand why the derivative of current with respect to time keeps decreasing.
Sometimes I thought of it like: current suddenly increases causing a sudden increase in back emf from zero to a certain value, which by turn would cause the current to decrease, and for the current to increase anymore back emf needs to decrease without increasing again.
I hope some one helps me clarifying things a bit, but please mention in details what happens once we close an LR circuit.
Regards
I have a misconception regarding self inductance. I know that back emf induced in an inductor starts with the same value of the original voltage source and then keeps decreasing to reach zero. I also know how this is related to the derivative of current with respect to time, though I fail to understand why the derivative of current with respect to time keeps decreasing.
Sometimes I thought of it like: current suddenly increases causing a sudden increase in back emf from zero to a certain value, which by turn would cause the current to decrease, and for the current to increase anymore back emf needs to decrease without increasing again.
I hope some one helps me clarifying things a bit, but please mention in details what happens once we close an LR circuit.
Regards