Help designing a RC passive high pass filter

[bengaltiger14]

Homework Statement

I was asked to desing a RC passive high pass fiilter with a cutoff of 3KhZ.

Homework Equations

The formula for Fc = 1/(2piRC)

The Attempt at a Solution

I set 3kHz = (1/(2piRC)) but am not sure what to do next. Do I pick a random cap or resistor value and solve?

 

[denverdoc]

Is that it? Nothing else, no mention of impedances, voltages, anything?

 

[SGT]

Since resistors cover a larger range of commercial values, you should pick a reasonable value for the capacitor and calculate the corresponding resistor.

 

[Panda]

Look up the standard ranges for electronic components, E12, E24 etc...

 

[solderstain]

Sorry to dig up a really old thread... I found this site via Google.

I want to use this formula:

Fc = 1/(2piRC)

to determine the corner frequency of a passive 'tone control' circuit as commonly used in electric guitars (a low-voltage AC circuit).

What I don't know about the formula is what the proper units are for R and C.

Is R in ohms? Thousand ohms?

Is C in farads? Microfarads?

An example would be a very common one:

A 500k ohm potentiometer, and a .022uf capacitor.

Plugging the numbers into a the formula isn't a problem - I just don't know what the units are supposed to be...