# Homework Help: Frequency in a circuit using complex notation

1. May 7, 2012

### hockeynut

1. The problem statement, all variables and given/known data

The frequency, ω, of the source in the circuit of Figure 2 is adjusted until ig is in phase with vg.

(a)using complex notation, determine the value of ω (rad/sec)
(b)if vg = 20 sin ω t [where ω is the frequency found in 2(a)], determine an expression for the output voltage, v0

2. Relevant equations

3. The attempt at a solution
See attached attempt on Question A & B - can someone advise if it looks right?

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2. May 7, 2012

### Staff: Mentor

I think your frequency ended up being one order of magnitude too high. Check your math.

3. May 9, 2012

### hockeynut

Thanks gneill.
Ah so where I have 10 to the power of 8, it should be to the power of 6?

4. May 9, 2012

### Staff: Mentor

Well, you've got both 106 and 108 in the relevant area of your work, so you really should be more specific. But yes, that is the issue.