Why are electric wires made up of copper or Aluminium and not of rubber or plastic?

Copper electrical wires are safer to use than wires made of most other conductive metals because they are resistant to heat. … It has high electrical conductive; it’s inexpensive; it’s ductile; and it’s thermal resistant. This makes is the universally accepted standard for the manufacturing of electrical wires.

Why are electric wires made of copper or aluminium and not of rubber or plastic?

Copper and aluminium metals are also good conductors. Electric wires are made of copper and aluminium because they are conductors of electricity. For example : iron, steel, mercury, gold, metal alloys (like Steel, brass ,bronze) are conductors of electricity.

Why are electric wires made of copper or aluminium?

Copper and aluminium are most frequently used as the electrical conductors in electrical cables due to their low resistance and excellent conductivity. These metals are both ductile and relatively resistant to corrosion, so they can be easily shaped into wires and they so not degrade over time.

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Why are electric wires made of copper and not plastic?

Explanation: Electric wires are made up of metals (copper and almunium) because they are conductors but their covering is of plastic because it is an insulator.

Why Rubber is not used to make electric wires?

Answer: Materials that do not allow electricity to pass easily through them are called insulators. Rubber, glass, plastic, and cloth are poor conductors of electricity. This is why electrical wires are covered in rubber, plastic, or cloth.

Why are electric wires made up of copper?

(a) Copper metal is used for making electric wires because it is highly ductile in nature. It is a good conductor of electricity. … Due to this property metals can be stretched without breaking and drawn into thin wires. Metals have free electrons which makes them good conductors of heat and electricity.

Why are wires made out of aluminum?

Copper and aluminium are most frequently used as the electrical conductors in electrical cables due to their low resistance and excellent conductivity. … For this reason aluminium finds favour in large size cables and cables for overhead power distribution.

Why aluminium is not used in electric wires?

Creeping: When electricity flows through wire, the wire heats up. Aluminum wire expands more than copper when it heats up. … When aluminum wiring rusts, the white oxide is not a very good electrical conductor. It does interfere with the flow of electricity, and again, can cause overheating.

What is the difference between copper and aluminium?

Copper wire is heavier, and aluminum is lighter and silver grey. The other main difference between copper and aluminum wires is the resistance of the material. … Copper not only has a higher conductivity than aluminum, but is more ductile, with relatively high tensile strength, and can be soldered.

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Does copper and aluminium react?

Aluminium appears less reactive than copper. The aluminium foil appears unable to displace copper from copper(II) sulfate solution. … This allows a simple exchange reaction with the copper(II) sulfate. The protective oxide layer forms instantly the aluminium is exposed to the air.

Why are electric wires made up of metals?

Metal is used to make wires because of the good conduction properties of electricity. It has a minimum loss of energy when the electricity is passed through the good conductor. Metals are ductile and malleable which is drawn into thin without breaking.

Why are electric wires coated in plastic or rubber?

Covering electrical wiring using plastic ensures that the current doesn’t flow outside the system. This avoids shocks, short-circuit etc. … Plastics are non-reactive and poor conductors of electricity or to be precise, they are insulators. They do not allow the electric current to pass through them easily.

Why is the outside of an electrical cable made of plastic?

All three wires in the cable are bundled together and there is extra plastic insulation wrapped round them all for safety. This holds the cable tightly in place so that the cable cannot be pulled out of the plug.

Is copper a wire?

A copper wire is a single electrical conductor made of copper. … Copper has the lowest resistance to the flow of electricity of all non-precious metals. Electrical wiring in buildings is the most important market for the copper industry. About half of all copper mined is used to make electrical wire and cable conductors.

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Why rubber is used in cables?

Rubber has been used as cable insulation and sheathing material long before other insulation such as PVC and PE can to be commonly applied. … The principle advantage of all rubber cables over other insulated cables is the excellent flexibility in temperature range. They also have very good water absorption properties.

Is rubber a good conductor of electricity?

Metals are generally very good conductors, meaning they let current flow easily. Materials that do not let current flow easily are called insulators. Most nonmetal materials such as plastic, wood and rubber are insulators. … Electricity requires a complete “loop” for current to flow.