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What's the factors affecting resistance of a wire? and why? thank you!
i) Cross-sectional area of the wire. Reistance is inversely proportional to the area of cross-section of the wire. More the cross-sectional area, easier it is for the electrons and hence charge to flow and hence more current and less resistance. ii) Length of the wire. Resistance is directly proportional to the length of the wire. More the length of the wire, longer is the distance to be covered by the electrons and hence charge thereby reducing current and increasing resistance. iii) Temperature. Higher temperature results in higher resistance. Higher the temperature, faster will be the oscillations of the ions in the conductor and the moving electrons will have to undergo more number of collisions per unit length of the wire, thereby reducing time between successive collisions and reducing drift velocity of the electrons which results in less current and higher resistance iv) Material of the conductor Some materials like metals are better conductors of electricity and offer less resistance to the flow of current. Non-metals have poor conductivity. Conductivity of charge in metals is mainly due to the free electrons in the outer orbits of metals.
I need to buy some electrical wire for my car, does it matter what color the copper wire is inside of ( i.e. black,yellow,red,green,blue,etc.)
The color of the wire indicates wire gage
my speaker makes a fuzzy or static noise while the scene has high or low sound. I cut my wire in half because I bought a subwoofer and we didn't get the wires with it. So I cut it. After all I didn't need the wire for the subwoofer. Could my speakers make such noises because of cutting a wire?
Shortening your speaker wire will not cause this problem. In fact, shortening your speaker wires should give you less static since there is less resistance. Most than likely, it's not your speakers causing the static sound, but your amplifier or receiver. You may be looking for a new one soon.
I just bought an exhaust tip with leds which needs to be wired up to the brake lights on my mazda 626. Can somebody tell me which colour wire it is (positive) on the wiring to the brake light? There are a few wires and I dont know which one it is! Thanx
Its either red or green,sometimes white if there is a black ground wire.
The infamous headlight switch please help
What is so infamous about plugging the wiring to the switch? It will only plug in one way. UPDATE 8/6/11: In over 45 years, I've only replaced one headlight switch that had melted and that was on a 1994 Plymouth Acclaim and the driver had left the headlights on all night and yes it drained the battery. The plastic plug had melted but the wires had not burned through, so I had something to work with. There is a possibility you can find a wiring diagram on Auto Zones website for your car, they do have an extensive library or you could try to find a Haynes manual for your car. Or if you are low on $$ if you tell us what manufacturer, model, year of car you drive someone here might be able to help.
I need to wire a single 120v outlet from the 240v volt wire I use on my compressor. Im installing a 120v electric automatic drain valve on my large shop air compressor. The compressor is wired up with SJ00W 10-AWG, 4-wire power cable (red,green,black white wires). and is rated at 240v @ 15-amp(compressor not wire). The drain valve uses a normal house hold current wiring config. (black,white and open copper)The 240v power supply is the only supply I have near by, (two of them actually) Or I would just wire the automatic valve off an outlet and call it a day. So How do I wire a 120v 3-wire set up from the 240v 4-wire supply? Thanks
I swear these people on here are crazy sometimes. People he was never asking how to wire e recepticale. He is asking how to take a four wire 240vac connection to a 3 wire 120vac connection. He is wiring it to a auto drain valve that has a termination box on the side of it or a pecker head as we used to call it. Here is how to do it. Go to your breaker panel determine wick breaker is feeding the cable/wire your wanting to use. Once you have done this remove the breaker panel cover. Then remove the wires from the breaker. These should be the red and black wires. Now remove the two pole breaker and replace it with two single pole breakers rated at 20 amps. Using black electrical tape, tape the end of the red wire up and secure it inside the breaker panel so that it is out of the way. Now land the black wire to one of the breakers you just installed. The second breaker will not have anything wired to it, it is a spare to be used later but must be installed to cover the hole left by the two pole breaker. Label you panel to indicate the auto drain valve and the spare breaker you have just installed. Now at the auto drain valve the black will be the hot/L1 white is neutral/L2 and the green is ground. The red can be taped up and secured out of the way or cut back and taped up if you don't think you will need it in the future.
the sensor part has 4 wires,(2 white,1 black and 1 red)each light has 1bl.and 1white
The other answer that has directions doesn't sound right for your case. Do you have a link to the actual product? Two white wires sounds strange, unless they have stripes or something to differentiate them. It seems pointless to have 2 wires that would just be connected together. Give me a link or the actual brand/model number and I'll give more information.
I am trying to replace my cigarette lighter on my car. The replacement requires the wiring to to be redone. It has a terminal wire attached to it, but when I attach it to the wire on the car it doesn't work. After reading the reviews on the product everyone has said the wiring needs to be redone. What wires do I connect to what (Positive, negative, terminal). I am using product REPU506801.
You need to get a test light and find a wire under the dash or coming from the ignition that has power when the key is turned on. If you want the plug to have power when the key is off then you will need to find a wire that has power when the key is off. Once you find the wire make sure its thicker wire and splice into it.