#### edd grog

Joined Nov 16, 2008
3
ive just been given the question in the atached file, ive answered the second half but on the first half of the question im in 2 minds on the answer, somethings telling me that when one side is positive then the other is negative, but when i try and work out the path through the diagram, this isent true. any help would be great .
View attachment rectifier.doc

#### mik3

Joined Feb 4, 2008
4,846
It is -Vdc, where Vdc is the average voltage of the rectifier output. This is because you measure with respect to the positive side, thus you place the negative lead of the multimeter to the positive side and it measures negative voltage.