Measuring Voltage

Status
Not open for further replies.

Rumieus

New Member
How do you measure V(out) using osilloscope?

Vin=10Vpp
f=25Hz
R=1K
C=16nF
 

Attachments

  • untitled2.PNG
    60.6 KB · Views: 151
From the oscilloscope, how do you measure V(out), the answer for voltage divider V(out) is 0.025V.

I know how to calculate frequency, F=1/t.
Vpp = 2Vp.

But I cant figure out how to calculate V(out) using the waveform.
 
I've no idea what the figures are about?, but you stick the scope on the output, and measure it - that's what a scope is for.
 
The scale is 5V/division therefore it's 5V peak or 10V peak to peak.

The RMS voltage is 5/√2 = 3.54V.
 
It's not my homework..
I don't understand and I post it here..
And the other thread I post (same as this post) was a failure because of internet connection.

I want to calculate V(out) using oscilloscope.

From mathematic equation, we can find V(out) using,
Xc = 1/2 pai Fc
Z= √Xc² + R²

And V(out) = Vin x R/Z.

But how to calculate it using oscilloscope?
 
It's a duplicate thread.
https://www.electro-tech-online.com/threads/measuring-voltage.42536/

Please do not make duplicate posts or threads, they do not increase your chance of a helpful response but only reduce it, as people get confused and can't always see what others have suggested in the other thread(s).

If you have made this post or thread in error then please do not be offended. We get lots of people making duplicate threads under the misapprehension that it will increase their chance of a helpful response when in practice the reverse is true.
 
Hi Rumieus,

Looks like a couple of problems with your circuit or scope.

First, the wave generator looks like it is set for 25Hz yet your scope
appears to show 50Hz.

Second, why are you feeding the network with plus and minus sine waves
when your formula only shows one input (like from the plus sine wave)?
 
Yeah.. I reduce the frequency from 50hz to 25hz after I took a screen shot of my computer.. Sorry about that..
 
Hi again,

Ok, so why feed it with plus and minus sine waves instead of just a
single plus sine wave?
 
From the attachment, V(out) = √2 x 17.771mV = 0.025V which is correct according to the book I'm currently studying.

So how we find V(out) using oscilloscope?
5V/div x 2 = 10V, which is the V(in).
Vp = 2Vpp, = 5V.

Vrms = (1/√2) x Vp.

So how you find V(out) from the wave?
 

Attachments

  • untitled3.PNG
    58 KB · Views: 136
Last edited:
Status
Not open for further replies.

Similar threads

V
  • Question
Logging Voltage
2
Replies
22
Views
2K
Voltmanbucks
V
  • Question
No contact AC voltage sensing
Replies
12
Views
986
rjenkinsgb
G
  • Question
Voltage follower with feedback resistor?
2
Replies
32
Views
4K
Diver300
D
  • Question
Cable for RF (high voltage) instrument
Replies
1
Views
755
rjenkinsgb
G
  • Question
A/D converter reference voltage on negative terminal
Replies
19
Views
1K
gjoo
G
Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…