Kavik. You'd posted this chart for copper wire reference. Some of the wire I'm using that came with a radio shack learning kit is visibly not copper (color of bare wire is silver). Do you think it's stats are comparable to those in your chart? And do you know what material is likely being used?
Thanks Dave. I can't keep my eyes open. Lol. I'll try in the morning. Can you draw me a simple breadboard circuit to test current with a 9V? Reading the manual I realize that testing current requires the circuit to be broken first and then closed with the multimeter. I want to make sure I have...
Are you sure the other measurements will still work if the fuse is blown? I opened it up and it doesn't look like anything is blown.
To reiterate as I mentioned above, the meter still works. I get measurements for Ohms and V. It's only Current that sits at 0 no matter what I do.
Thanks. I actually have the hard copy manual it came with. And I unscrewed the battery compartment when I initially put the battery in. You're saying the possibly blown fuse as well as the two replacements are in there?
I've definitely touched the leads directly to the 9V, but never to test current. Only Ohms and V. Would it blow the fuse no matter what? Or only if I tried testing current directly on the battery?
Either way, I'm not home to look at it but does anyone have this model from RadioShack...
Thanks guys. One thing I'm having trouble understanding is why, for the life of me I can't get the multimeter to read A or mA. It always says 0. I understand that it may be too small but the meter has enough decimal places to show if it's set to show A, not to mention that it automatically...
Kavik. Thank you so much. This really helped understand a lot. Just a few questions.
1. Why are you giving the LED a resistance of 300Ohms. I have two LED's. One has a resistor in it, but even that doesn't as 300Ohms on the multimeter.
2. How do you know the internal resistance of the...
is the AMOUNT of copper in the tiny wire not enough, or is resistance the same resistance all along a piece of copper no matter how long it is? i.e. does a longer piece of copper offer more resistance than a shorter?
So if I understand correctly, voltage is the measure of potential energy...
Thanks for pointing me int he right direction. Admitedly I've lost SOME knowledge since college, but I'm dumbing my questions down a bit in order to get more of an explanation. Sorry, I guess I want the internet to do the work for me lol. But you're right, the info IS out there and is in my...
I understand his explanation conceptually. But like anything, I want to see my failure and then success work because of my understanding of the conceptual laws. So you'e saying that the drop in voltage isn't due to power being used up by too many items on the circuit but instead because the...
Ok so ultimately the voltage isn't enough to power the LED because the copper is drawing too much of the 9 Volts, correct?
The part I'm still confused about then is, how come if I replace the copper wire and close the circuit with something else (e.g. a toggle on/off switch or the voltmeter...
I understand resistance and that ohms are the unit of measure when describing the magnitude of resistance. But no I do NOT know about ohm's law. Thank you. Why was that so hard to grasp? lol. I CAME here for direction, and ohm's law apparently is where I go next. Thank you.
I know I am shorting the circuit. Can someone else actually read my post and offer some useful information instead of repeating what I said? I want to know what is happening to the current and why. Thanks.
Please bear with me as I'm relatively new to hands-on circuitry. I have a breadboard powered by a 9V alkaline battery. If I hook up an LED to the positive strip and ground to the negative strip, the circuit completes and the bulb lights.
If, however, I take a simple 22 AWG wire to jump from...