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FAQ

2 long striaght wires (20m each) ,each having a 1.0A current going up.The distance between the two wires is 1.0m(a) what is the magnetic field (magnitude and direction) at a point o.50m left of the wire 1?(b)what is the magnetic field (magnitude and direction) at a point 0.6m right of Wire 1?

Assuming Wire 2 is to the right of Wire 1: a) Bwire1 = (u*I)/(2*pi*r) = ((4*pi*10^-7)*1A)/(2*pi*0.5) = 0.000004 Bwire2 = 0.000000424 Btotal = 0.000004424 (away from wire 1) b) Bwire1 = 0.000003333 Bwire2 = 0.000005 Btotal = -0.0000017 (toward Wire 1)

i have a 00 gmc yukon and tried installing my cd deck. i pulled off the original harness from the stock deck radio and now its just all wires (its my first so i didnt know), i connect the alpine deck wires and tried to connect them all together. i had a few figure out, except a small noise coming from my stock tweeters every time i step on the pedal. then my speed odometer sensor was going with the bass of my subs... whats wrong? can someone find me a chart of what color wires supposed to go where? thanks for your help

2000 GMC Yukon Car Stereo Wiring Schematic Car Radio Battery Constant 12v+ Wire: Orange Car Radio Accessory Switched 12v+ Wire: Yellow Car Radio Ground Wire: Black Car Radio Illumination Wire: Brown Car Stereo Dimmer Wire: Gray Car Stereo Antenna Trigger Wire: N/A Car Stereo Amp Trigger Wire: N/A Car Stereo Amplifier Location: N/A Left Front Speaker Positive Wire (+): Tan Left Front Speaker Negative Wire (-): Gray Right Front Speaker Positive Wire (+): Light Green Right Front Speaker Negative Wire (-): Dark Green Left Rear Speaker Positive Wire (+): Brown Left Rear Speaker Negative Wire (-): Yellow Right Rear Speaker Positive Wire (+): Dark Blue Right Rear Speaker Negative Wire (-): Light Blue

my dogs have chewed my central air contactor wire.my ac will not cut on. does anyone knows how to replace them and where to buy replacement wires locally( i live in Dallas TX.) i would like to do it myself instead of spending a lot of money.

This should be copper wire and a splice could be made with little risk since the thermostat is a low voltage circuit in most cases. Try the local HVAC contractor for some of the type you need. There are different types ( number of conductors) for different controllers so they need to match. If you just have the HVAC contractor do a fall service on the system they can make the needed repairs and prepare the whole system for the winter. It was probably used a lot this last summer so a service is about due.

i want to rewire my trailer harness on my truck. i have a 6 wire roung plug but i wat a 7 wire plug. what is the 7 wires for?

Prepare for accurate and confusing information. The center pin on a 7 pin plug is generally used for backup lights (black wire) if you have them wired in. Being that you have a 6 pin plug you probably don't so you will disregard the center pole. This is the order of color starting from the ground pole (white wire). The ground pole should be the one next to the slot in the body of the plug that lines it up with the plug housing when you put it all together. White (ground), Yellow (L turn), Brown (tail lights), Red (battery charge wire), Green (R turn), Blue (trailer brakes). If you don't have trailer brakes, disregard that pole. The brake lights work through the turn signals, if they are wired separately, it is wrong. Starting at the ground pole next to the slot in the plug, the order of colors goes around the plug in the direction away from the slot, you will end with the blue wire on the other side of the slot next to the white wire. It's very confusing to explain and when you read the colors on the plug compared to what I have told you, you will definately scratch your head. This is the (U.S.) national standard for all trailer wiring, unfortunalely, not all manufacturers adhere to this thus causing confusion for people such as yourself. I cannot even begin to guess how many trailers I have wired and how many tow packages I have installed on cars and trucks. I wish there was an easier way to explain it but the only other option is a diagram which answers does not support. Worse comes to worse and you don't like any of the other answers you get, e-mail me and I will mail you a diagram or maybe even a picture if I can come up with one.

I have a 3 wire source I want to connect it to a switch on/off and then make it 2 wire to the light

Is the 3rd wire bare or green? And the first response you received is from a automotive electrician DO NOT TAKE THAT ADVICE automotive wiring is backwards from AC residential wiring. You can e-mail me or one of the other sparky's on this site for help just click our profiles and read the answers to verify our qualifications. Then click contact.

I have a kicker cvr 12 inch 2 ohm dual voice coil sub (400 watts) and a kicker zx750 amp. how to wire?

if you wire that sub at 2 ohm you might supply too much power and make it jump out of the basket. i would wire it at 4 ohm and allow it to get just enough power. a + on the sub to a + on the amp and on the same voice coil the - to the - on the amp and connect the + and - on the other voice coil together

When you electromagnetize a nail with wire coiled around it, then connect it to a small battery, how come it works when the wire has been been insulated,..... and what if you were to use uninsulated wire.

If the wire were uninsulated, then the coils of wire would short circuit. This would bypass the current and no magnetising would occur. Although a wire with current passing through it has a magnetic field, coiling the wire concentrates the magnetic field. When you put the nail in the coil it couples this field and the random magnetic particles align forming a magnet.

A long horizontal wire carries a current of = 52 . A second wire, made of 1.00--diameter copper wire and parallel to the first, is kept in suspension magnetically 5.0 below.What is the magnitude of the current in the lower wire?

There is 1V across ampere meter. To find the current.... Current = 1V / meter internal resistance