Choosing resistor and capacitor for 100 kHz low pass filter cutoff

[blair321]

hi there

if anyone could help i would be very grateful

for a low pass filter

from the following list choose the two components which would produce a cut off frequency closest to 100 khz

resistor capacitor
1.6 k ohm 1 nf
33 k ohm 330 nf
150 k ohm 10 uf

formula being fc = 1 / 2pi * r * c

its the exact values for nf and uf that are posing the prob

 

[MaxMoon]

1.6k and 1 nf

 

[MaxMoon]

nf = 10 to the ninth
uf = 10 to the sixth

 

[blair321]

many thanks

 

[chroot]

Originally posted by MaxMoon
nf = 10 to the ninth
uf = 10 to the sixth

I think you forgot some minus signs in there.

- Warren

 

[MaxMoon]

Guess I did.