Q: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)

Q:Quick question with hopefully an easy answer. I had a dimmer switch go bad on a light in a dining room. I bought a new switch and put it in. It was working fine, so I thought, then I noticed that when the dining room light is off, the dimmer works on everything else on the circuit, for example outside lights, hall lights, etc. I can dim all of those things when this switch certainly didn't do that before. Also, if the dining room light is on, all of the other things on the circuit I mentioned before do not work at all. I've obviously incorrectly wired the switch somehow, any thoughts on what I did incorrectly and how to fix?

Not sure how to answer this. You only had to remove and reinstall 2 wires from the old to the new switch. You obviously disconnected more wires than needed and screwed it up. No way to tell you what you did wrong without actually being there and sorting out your mess. Sorry , now you need a pro, or you have to go thru it one by one until you find the original wire going to the light, then reconnect everything else the way it was. maybe getting an electrician or someone that knows what they are doing may prevent a wire fire in your walls as you obviously do not know enough about wiring to fix it yourself

Q:I have a 1997 saturn sc2. In the trunk of my car there was a wire dangling down from the top when i bought it. Asked seller and he didnt know. It is not the trunk light wire or has to do with any of the tailights,blinkers,brake lights. It looks like a factory wire. It has a bunch of holes in the connector.

it might be a connector for a cd changer. if it has a factory radio with a cd button, but no in-dash cd slot, that could be what youre lookin at. sounds like a square plug? maybe 10 or 12 holes?

Q:Hello,I got a ventilation fan for the bathroom. The fan has 2 wires and there are 2 wires sticking out of the wall.How do I know which wire connects to which wire?What would happen if I connect the wrong wires?

It doesn't matter, they are made so that no matter what wire you connect the fan will work, just don't get a fan that has 3 wires because then you have to wrap electric tape around the 3rd wire and try to fit it somewhere so it wouldn't be seen. The Chandliers are the same way, 2 wire connect to the 2 wires and no color matching is necessary.

Q:I bought a bathroom vent fan today, the one that was in there hasnt worked since we bought the house. Anyways, i have a black wire, and a white wire coming from the light switch on the wall ran up to the ceiling where the fan is, and a black, white, and GREEN comin off the new fan i bought. Do i need to get in the attic and run a ground wire from outlet to fan? Or are the black and white good enough? The old fan didnt have a ground wire, just the other 2. Any info is greatly appreciated. Thanks

Green wire should be screwed into the inside of the receptacle box or pigtailed to the bare copper wire in the back of the box. If neither a bare wire or a green screw is present, call an electrician to run proper wiring to the box

Q:is it safe to use twist on wire connector to connect my new stereo or should i crimp instead?

I would suppose in this case there is a good better best way to do it. IMO I would never do twists on a stereo, at the very least, do butt connectors. Best way would be to solder each wire one by one and seal with heat shrink. That will give you a very clean look and you'll be proud of yourself :)

Q:would the wiring harness on a 1.8 acura integra engine fit a 1.6 honda civic harness?

Yes.. As long as its an OBD0 to OBD0, OBD1 to OBD1, OBD2 to OBD2 and if it Vtec or non Vtec. If you try to swap an OBD1 to OBD2 don't work, and vise versa, If both are OBD2 and are both Vtec. yea it will work, you'll just have a couple of wire left if you use the harness from a 1.8 Vtec.

Q:I want to connect a fan with light and pull chain only to a box that has the old wiring black and white to the new wiring black,white and green.Is this possible and how do I do it.

Knob and tube wiring should be replaced - I don't care what the grandfather clause says in the electrical code -- safety first.

Q:im installing an amp and i have no clue what to do with thw power wire.... I read to cut open my steros power wire (usually the blue) and wrap my power wire around it... I found the blue wire but there was a tag... Caution Remote output only... This is not the wire for power supply. please connect this wire to the remote for the amplifier... Does this mean i just connect this wire directly to my amp?

ok wait hold up. so the only wire that should be hooked from the amp to the headunit is your speaker wires, remote turn on wire, and your rca cables. ....What you need to do is get the power cable(usually red) run it from positive on the battery to the POS on your amp. next put your ground wire from the GND on the amp to bare metal on your cars chasis.

Q:all my wires are cut and im trying to find the power/hot wire so that i dont fry anything....im trying to hook up a new radio

2000 Chevrolet S10 Blazer Car Stereo Radio Wiring Diagram Car Radio Constant 12v+ Wire: Orange Car Radio Switched 12v+ Wire: Dark Green Car Radio Ground Wire: Black Car Radio Illumination Wire: Gray Car Stereo Dimmer Wire: Violet/White Car Stereo Antenna Trigger: N/A Car Stereo Amp Trigger Wire: N/A Car Stereo Amplifier Location: N/A Front Speakers Size: N/A Front Speakers 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 Rear Speakers Size: N/A Rear Speakers Location: N/A 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