A friend asked me to help him answer a question for his past paper revision notes, and apparantly i got it wrong. Now i look silly!. The question was:
What value of capacitor must be added in series with a 1k ohm resistor, and signal source (1v peak @ 1khz) to complete the potential divider and reduce the peak voltage to half.
It should be 92nf right???
His Teacher marked it wrong and said the answer was 159uf - with a little note on the side "Reactance of 90nf does NOT equal 1k ohm at 1khz".
Who's right??
Megamox
What value of capacitor must be added in series with a 1k ohm resistor, and signal source (1v peak @ 1khz) to complete the potential divider and reduce the peak voltage to half.
It should be 92nf right???
His Teacher marked it wrong and said the answer was 159uf - with a little note on the side "Reactance of 90nf does NOT equal 1k ohm at 1khz".
Who's right??
Megamox