# Simple Kirchhoff Loop problem with inductor

1. Oct 20, 2008

### GPhab

1. The problem statement, all variables and given/known data
Just refer to the figure. The part shown is a part of a big circuit which you and anybody else shouldn't worry about.

2. Relevant equations

3. The attempt at a solution

I considered the battery terminals to be at 10 and 0V respectively. So the farther end of the resistor should be at 5V. An inductor produces a back EMF, which means that along the direction of current, there is a voltage drop. Therefore, A will be at 5V. So V(a)-V(b)=0. Am I right? I would be grateful to anyone who can help me solve similar problems, especially the ones which involve capacitors too. When does the "voltage" drop and when does it rise?

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2. Oct 20, 2008

### JoAuSc

First, we need to decide which way the current's flowing, although for this problem it doesn't seem to make a difference. Let's say the current goes from right to left, point B to point A. As you go across the resistor, battery, and inductor, you'll have certain voltage drops or rises. I think you forgot about the voltage drop across the battery.

3. Oct 21, 2008

I didn't