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FAQ

If 46 m of nichrome wire is to have a resistance of 12.0 Ω at 20°C, what diameter wire should be used? in mm

Resistance of a wire in Ω R = ρL/A ρ is resistivity of the material in Ω-m L is length in meters A is cross-sectional area in m? A = πr?, r is radius of wire in m resistivity Nichrome 150e-8 Ω-m 12 = (150e-8 Ω-m)(46m)/(πr?) solve for r, which would be the radius of the wire in meters. change to mm, and multiply by 2 to get diameter. .

Why does a thin wire melt and a thick wire glow when put up to the terminals? Explain in terms of resistance and current. Thanks=]

the electrical restistance of a thin wire is greater that the tick wire. thus : Watt = current * current * resistance if the resistance of the thick wire is 10 times the resistcance of the thin wire , then ( with same voltage ) you have for small wire Watt = current * current * resistance for thick wire Watt = 10*current * 10*current * (resistance/10) = 10current current resistance. so the power generated in the thick wire is ten times more than the power in the thin wire ( if you keep the voltage the same ) so that is not why the smaller one melts. I dont know why it melts then, interesting

in hooking up a hot wire from the battery to a toggle switch inside a vehicle, i ran a seperate ground wire to the body, there are 2 wires coming from the unit i need to hook to the toggle switch.how do i test to see which one of those is a hot wire? i am not too smart at this. ty kindly

a test lamp, connect clamp to your known good ground then touch the pencil type end to the hot. if it lights then thats your positive. do it opposite to test for a good ground .

I have 16 gauge speaker wire, but i need a lower gauge. instead of spending money and buying a lower gauge can i double this wire up and have that make it a lower gauge? so i would have 2 negative and 2 positive wires going into the terminal.

Nope, gauge is determined by the thickness of the wire. Don't be a cheapskate, buy the proper gauge.

hiI got a car radio quot;Grundig WKC 3680to stick to my car, I don't understand is the difference between : 12 VOLT BATTERY WIRE and 12 VOLT IGNITION WIRE, which one to use? I got only one cable bringing the current from my Renault 4 car!thanx

12 volt battery wire is the wire thats always hot meaning theres power always going to it and the ignition one only sends power through it when you turn your ignition on

Theirs a green ground wire, a white neutral wire and for some reason 3 black wires.

If the ceiling fan has three speeds, those would be wired to a 3 position switch as low, medium and high. Normally the wires would be labeled if they use the same color. If they aren't tagged, and you want to put in a speed control switch, you'll need to experiment; either at the fixture, or just wire them down to the wall switch and make your temporary connections there to see which wires go with which speeds (then TAG them!).

exact wiring

1995-96 Dodge Dakota Alarm, Remote Starter, Keyless Entry Wiring Information Constant 12V+ Pink/Black Ignition Switch Harness Starter Yellow Ignition Switch Harness Ignition Dark Blue Ignition Switch Harness Ignition 2 Black Ignition Switch Harness Accessory Black/Orange Ignition Switch Harness Tach Gray Coil Neutral Safety Wire Brown/Yellow Driver's Side of Trans. Brake Switch White or White/Tan Brake Switch Trunk Pin n/a Parking Lights Black/Yellow Light Switch Head Lamp Light Green Light Switch Hood Pin n/a Door Trigger Yellow (-) Driver's Pin Switch Door Lock Orange/Purple Driver's Kick Panel Door Unlock Pink/Purple Reverse Polarity Horn Wire Dark Green/Red (-) Fuse Panel Windows Up LF=Light Blue, RF=Brown/White Windows Down LF=White, RF=Purple/White

Any instructions on how to make rings, necklaces, and bracelets out of colored telephone wire.

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