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Black
Black electrical wire is used for power in all circuits. Any circuit's black wire should be considered hot or live. Black wire is never used for a ground or neutral wire and should be used as the power feed for a switch or an outlet. A black wire is often used in a circuit as a switch leg, the connection that runs from the switch to the electrical load.
Red
Red electrical wire indicates the secondary live wires in a 220-volt circuit, used in some types of switch legs and in the interconnection between smoke detectors that are hard-wired into the power system. You can connect a red wire to another red wire or to a black wire.
Blue and yellow
Yellow and blue electrical wires are also used to carry power but are not for wiring the outlets for common plug-in electrical devices. These colors are used for the live wire pulled through conduit.
You'll use yellow mainly as switch legs to fans, structural lights and switched outlets. You'll use blue mainly as a traveler for a three-way or four-way switch.
White and gray
White and gray indicate a neutral wire. White is the color most often used for this function. A neutral wire connects to the neutral bus bar within an electric panel. (A bus bar is made of conductive metal that attracts the electric current for distribution outward to feeders.)
You can connect white and gray only to other white and gray wires. Although neutral, they can still carry current, particularly the unbalanced load - the electricity not being used and being returned to the electrical service.
Green
Green indicates the grounding of an electric circuit. A green wire can connect only to another green wire and should never connect to any other color wire. Green wires connect to the grounding terminal in an outlet box and run from the outlet box to the ground bus bar within an electric panel.
The purpose of the green wire is to provide a path to ground for a circuit's electric current if a live wire within the circuit happens to touch metal or some other conductive material. In the event of a fault, it could carry significant current, so treat green wires cautiously.
What else can I help you with?
Do wires that have high resistivity have high conductivity also?
No. In fact it is the opposite. Conductivity is the reciprocal of resistivity so a high resistivity means low conductivity. peace.
Why does thin wires have high resistivity than thick ones?
Thin wires have higher resistivity than thick wires because of increased electron scattering in thin wires. In thin wires, electrons collide more frequently with the wire's atoms or impurities, causing more resistance to the flow of current. Thicker wires have more free space for electrons to move through, resulting in lower resistivity.
Is resistivity the same for all materials with the same length?
Yes, because the resistivity does not depends on the length of any materials. Resistivity is constant.-Ariel DUmancas-No. The resistance in different materials is different. For example, Copper has a low resistance to electricity compared to plastic. This is also one reason why copper is used instead of plastic in wires. Knowing the resistance of different material helps decide what material should be use for different objects (like copper for wires in plastics)
Can it be possible that 2 wires of different resistivities and same length have the same current?
Yes, it is possible for two wires of different resistivities but the same length to carry the same current if the voltage applied across them is adjusted accordingly. According to Ohm's Law (V = IR), the voltage across each wire will differ based on their resistivity and resistance. If the voltage is increased for the wire with higher resistivity, it can result in the same current flowing through both wires.
When a sample of germanium and silicon having same impurity density are kept at room temperature then resistivity of both?
The resistivity of germanium will decrease with increasing temperature due to a positive temperature coefficient of resistivity, while the resistivity of silicon will increase with increasing temperature due to a negative temperature coefficient of resistivity. At room temperature, silicon will have a higher resistivity compared to germanium.
Does high resistivity have a higher number or lower number?
High resistivity corresponds to a higher numerical value. In the context of materials, resistivity is a measure of how strongly a material opposes the flow of electric current; materials with high resistivity, like rubber or glass, have larger resistivity values compared to conductive materials like copper or aluminum, which have low resistivity values.
If the diameter of wire is double what is resestivity?
Resistivity won't change. Resistivity is a material property that doesn't depend on the shape.
Can resistivity be negetive?
No, resistivity cannot be negative. Resistivity is a material property that indicates how strongly a material opposes the flow of electric current. It is always a positive quantity, even though some materials may have very low resistivity values.
What is the resistivity of deionized water and how does it compare to the resistivity of other types of water?
The resistivity of deionized water is high, meaning it is a good insulator. It is higher than the resistivity of tap water or seawater, which have more dissolved ions and conduct electricity better.
What are the formulae of resistivity?
There is no 'formula' for resistivity. The resistivities of different conductors have been determined by experiment.
Does a thin wire has more RESISTIVITy or a thin wire of the same material?
Resistivity is a property of the material only, not of the dimensions of the wire. The resistance of a wire is the resistivity times the length divided by the cross-section area. So a long wire has more resistance, a thicker wire has less resistance, even if they are both made of copper with the same resistivity.
What is resistivity on what factor is depends?
Resistivity is a measure of a material's ability to resist the flow of electric current. It depends on factors such as the material's composition, temperature, and dimensions. Materials with high resistivity impede the flow of current more than those with low resistivity.
