Q:Why when you loop a straight wire into loops (coil), it acquires a higher inductance?

Imagine two closely spaced parallel wires. If you run a current through one, it creates a magnetic field that induces current into the second wire, which causes an even stronger magnetic field. Now if you run the same current through both wires, they both create magnetic fields that affect each other. Any two loops in the wire are just like two parallel wires with the same current, both creating magnetic fields that affect each other. So a loop is like a bunch of parallel wires affecting each other.

Q:ok...all the wires in my quot;atticare encased in this silver metal casing....when i opened a bathroom wall...the wires were also like that.....at the fuse box...they all leave like that........sooooo, can i assume all my wires are encased like that? does that make them pretty safe from rodents chewing? (yup-been watching Billy the Exterminator) why were they done like that? tx for any info....

In the U.S. it WAS called BX and is now called MC, standing for metallic clad. (If the lines are flex-able). This stuff was used to protect from damage. This is usually used in commercial applications, but is perfectly legal (if the proper connectors were used) in residential applications. It sounds like you are doing a remodel. If so, you will need a EXPERIENCED electrician to modify the runs for you. Don't let anyone tell you it is against code. It is simply overkill.

Q:i just got two new aiwa stereo speaker's they come with their own wiring in the back but i dont know which wire is whatthere is one black wireand there is another black with gray dashesim thinking the one with dashes is positive?the speaker works both ways

Chances are the marked wire is positive. For your purposes it doesn't matter a whole lot. The phasing (which DOES matter) will be correct as long as you are consistent with both speakers. If you can remove the front grill or otherwise see the speaker cone directly, you can check the polarity with a AA or other 1-1/2 volt battery. The cone will move forward when the positive wire is *briefly* touched to the positive terminal of the battery while the negative wire is held on the negative terminal. If you see it move back, you've connected the wires in reverse. Don

Q:do i need a different wire for in-wall speakers or a regular speaker wire

If you are installing in-wall wire, look for wire with CL3 or in-wall insulation. The wire is not the issue, but the CL3 means the plastic insulation around the wire is fire-resistant and wont act like a fuse to spread a fire. Many fire codes require this. Some of the Carol brand from Home Depot is CL3 rated or buy a spool of 12 ga from PartsExpress.

Q:wires have been cut and i have 4 wires i dont know what do.what colors are for what?

What are you wiring??

Q:The light fitting I bought has 1x Red Wire (A) 1x Green Wire (E) and 1x Blue Wire (N)...

In the uk red was live and black was neutral, is this part of multiple wall lights ? then it should be only one red is live, the other may go to another light fitting. The light fitting would possibly be red=live, blue=neutral and green is earth, I say possibly because it is a mix of old colours and new. There should be installation instructions with it. Start by connecting one red to the light fitting red and the black to the blue connect the earth, make the other red safe and switch on. If that doesn't work change the wall red to the other and try again. If everything is working and no other lights are not working then make good and leave as is, otherwise you may need to connect all reds together for the other light to work. You may be able to identify the live red if it is a single with grey insulation cable.

Q:One wire has part of the plastic coating on the end, the other wire does not.

the lead is the wires showing. lead wire can also mean attaching a wire and feed it through a wall attach other end to the wire and pull it through. Now if you need both ends to have wire showing take a utility knife firmly place wire on block of wood and lightly cut through the caseing. thats the thick wire that en cases the other wires and peal back and then cut it off. then carefully hold blade of utility knife and wire aganst your thumb on a 45 degrees away from you and pull that will strip the plastic off the wires hope that answers your question dave

Q:does bigger power, ground, speaker wires give more power 2 the amplifier?

Bigger power and ground wires will help, up to a point. If your wires are already big enough that you don't have a significant voltage drop between the battery and the amp, then bigger cables won't help anything.

Q:Can your use the power wire that they sell at home depo to do the big three upgrade or is it better to just get wire from a car audio store?

You can use any wire as long as it is the proper gauge required for the job you are doing! I am sure it will say in your installation instructions on which gauge of wire they reccomend for proper installation of the equipment you are installing

Q:Wiring

when connecting a wire dryer outlet to 10/2 with ground romex, where does the white/black and ground connect to on the outlet?