Angelina Jolie

Using sine wave analog multimeter to read square waves?

Here is my homework problem:

“If the AC voltage of a square wave is read using an inexpensive analog multimeter calibrated for sine wave input only, what would be the expected percent error?”

I think I’m supposed to look up specs of a cheap analog multimeter maybe? But even if I do that, I’m not sure how to produce an answer. Please help, thank you smart people of the world for spending your time helping a college student.

PHYSICS Distinction level question. Someone Help me out please?

So I have been doing this practical in lesson.

Here is what I wrote for the Merit part.

I have used the micrometre, rather than the vernier callipers or metre rule to measure the diameter of the wire because the micrometre measures to the nearest 100. It is more accurate and the results then are more reliable.
I have used an ohmmeter in one on my methods. This is because an ohmmeter gives you a quick and easy result in the experiment. It’s very simple to use and clear to read.
In other part of my scientific experiment, I have used an ammeter/milliammeter and voltmeter. An ammeter is very precise. It gives you a more accurate answer so the results become correct. The voltage/ammeter also gives more accurate answers.
The choice of shunts / scales I used was the 1 Volt scale. It is really quick and simple to read and to record the results. This is because there is only one needle which uses the whole scale. .
The ammeter/milliammeter is more suitable than an analogue meter to measure current through the wire in the experiment. This is because there was no parallax error on the digital scale, and on the analogue meter shown this error during the experiment. A parallax error means looking from a different angle.

The QUESTION FOR THE DISTINCTION now:

Evaluate the variables in operation of instruments used and how they could be optimized. ( How they can be used in the most effective way).
For your methods , explain the actions you undertook to ensure accuracy and precision. Your discussion should include both practical steps taken and analytical techniques used and the reason for these actions.

Can Anyone Help me out?

Thank you!

Is an oscilloscope required for making a synthesizer?

I want to build this analog synthesizer kit. (See link below). However, the website says one has to have an oscilloscope. Is that true? If so, what frequency? Is it possible to use a computer as an oscilloscope? (I have a BA in Math and another in computer science, a first year physics course and a high school electronics course. However, I have only build a few small circuits and only have a digital multimeter and a breadboard.)

http://www.musicfromouterspace.com/index.php?MAINTAB=CATALOG&CATPARTNO=SLMSMARKII_COMBO2&VPW=1277&VPH=731

What multimeter should I get for my technical theatre major?

I am looking for something that is not too expensive but will be able to handle the amperage/voltage etc of stage lighting.

Need help with Simulink Connections resistors & inductors Plz help (Mathlab)?

i cant connect the resistor and inductor and the voltmeter check this image

http://imageshack.us/photo/my-images/864/15328137.jpg/

i keep getting this red dashed lines
howa can i connect them the way i want?
i’m a mathlab beginner plz help

how do you correctly correct an ammeter and volt meter? (Science Question)?

i got a question asking how to correctly correct an ammeter and volt meter

Car Battery Draining?

This morning I tested my battery with a multimeter and cold it read 12.06. I had my wife start it up and it went to 10.30 and back up to 14.5. Yesterday my wife took to autozone and they said alternator was dead but didn’t give her a reading. She then went to Oreilleys and It read 12.54 off,10.50 starting, and 14.1 running. They said starter,alt and battery were great. We gone through 3 new advanced auto batteries since june 2011. All dying within 3 month period.

I don’t understand how it could be at 12.54 yesterday and now 12.06 today. Oreilleys said it was at 80%. Now its like 25%..

I have checked battery terminals,interior lighting,and even shut off the lighting inside. Radio is off,and nothing plugged into lighter. Its a 2000 ford windstar 3.8.

Somone said start pulling fuses but not sure what they are talking about or how to do this. Any help would be greatly appreciated.

I don’t understand why it was just

What would be an experiment where you would have to measure the resistance of a metallic conductor using a?

voltmeter and an ammeter? Could you go through the experiment step by step?

gas pipe carrying electrical current?

The wife and I bought an old house (built in 1923) with what we already know is old wiring, ready for replacement. We bought a used oven today to install in the kitchen and I plugged in the power cord (110v AC) and then when I pulled the natural gas flex line over to the valve, it sparked! I have done this before and I thought I knew what I was doing. I got my multimeter and saw the outlet was giving normal numbers but then I tested to see whether there was voltage between the gas pipe and the outlet ground. It measured around 60v AC. That’s not ok, right? What’s happening?

how do you make a schematic (or circuit) diagram that is described in words?

for example: a circuit consisting of a battery made up of two 1.5v cells in parallel, 2 light bulbs, a switch and an ammeter in series.