# AC Voltages

#### Tim Lafferty

Joined Dec 7, 2011
4
If I have a 9Vp-p with 12khz going through a 4.7k resistor how do i figure what the Vp-p value that the resistor drops

Joined Dec 26, 2010
2,148
If I have a 9Vp-p with 12khz going through a 4.7k resistor how do i figure what the Vp-p value that the resistor drops
The question you have asked cannot be answered unless you describe the circuit more completely. The best way would be to show a diagram.

If the resistor is connected straight across the 9Vp-p supply and common with no other parts intervening then the answer would be 9Vp-p. If there is more to the circuit, the answer may be different.

It is not possible to say how much voltage a resistor will drop when it is connected to a supply, without also knowing what load it is connected to.

#### Tim Lafferty

Joined Dec 7, 2011
4
9Vp-p -------4.7kresistor--------1μF capacitor-----1μF cap.------10kΩ
12khz

Then you have a 15Vdc in series with a 3.3kΩ and a 5.6kΩ and that is running between the capacitors.

would like to find out the Vp-p right after the first resistor.

Joined Dec 26, 2010
2,148
9Vp-p -------4.7kresistor--------1μF capacitor-----1μF cap.------10kΩ
12khz

Then you have a 15Vdc in series with a 3.3kΩ and a 5.6kΩ and that is running between the capacitors.

would like to find out the Vp-p right after the first resistor.

The circuit structure is still not clear: really it would be much better if you could post a diagram. (What does "running between the capacitors" mean - in series with them? in parallel with them?)