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Why are both conductors and insulators are both required to construct the electrical wiring in homes?
Wiki User
∙ 11y ago
The conductor is metal, usually copper today, but some applications use aluminum. The conductors "conduct" the current. The insulation protects the wire from damage and keeps you from getting shocked and keeps the conductors from touching each other and thereby causing a short circuit.
Wiki User
∙ 13y ago
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Why are glass and wood good insulators of electricity?
For Current(Electricity) to travel through an object valence electrons are required. Most metals have valence electrons hence are good conductors of electricity. In case of glass and wood free electrons are not present hence electricity does not flow through them.
Can an insulator become a conductor?
Sometimes. In most materials, no. However, things like vacuum tubes and MOSFETs in electrical amplifying equipment will change between insulators and conductors based on a "control" voltage. Computers rely on this behavior for their most basic principles of operation. Technically, all insulators are conductors because they conduct electricity through them. The difference is that insulators conduct a lot less electricity. Thus, for a conductor to become an insulator, we would have to raise the electrical resistance to a level that we could consider "insulating". In most materials this can only be achieved by changing the temperature, and the temperature change required for this is impractical to a great degree. Almost all electrical devices, however, rely on the ability of electrical switches to change from insulator to conductor to insulator again at will. Depending on the voltage applied to the "control" part of a MOSFET transistor, its resistance could be extremely high (several thousand or million ohms) or extremely low (about 0.08 ohms). Also the voltage will have a great deal to do with it. At a high enough voltage some material may brake down and conduct a large amount of current, llike a zener diode.
What is use of insulator?
There are many types of insulators, for example heat insulators, water insulators (also called hydrophobic insulators) and current insulators. The role of an insulator is to avoid passage of something from a system to another. For example, a current insulator is placed in between two parts of an electrical systems in order to avoid they influence each other through current losses or an heat insulator is placed on the wall of an house to avoid that the internal heat is dissipated towards the external environment. To find good heat insulators is difficult. If we define the heat conductivity k like the heat transmitted for unitary temperature difference through a unit area and unit length of the insulation material, lower the conductivity better the insulation. The better insulators (silica aerogel) have an heat conductivity of about 0.001 in SI units (J m /°K). On the contrary very good electrical insulation can be attained, one of the better electrical insulators is Teflon, whose electrical conductivity (current per unit voltage on unit area and unit length) is as low as 10-23 A m/V. Regarding insulation from material infiltrations, (for example water insulators that are used to avoid humidity to penetrate inside a room) the conductivity is defined as transmitted quantity of water per unit concentration difference between the two sides of the insulator per unit area and unit length. Lower the conductivity higher teh insulation.
What are two things required to make electric current flow in a circuit?
you need an electrical supply and a load. nice and simple.
Why is logic required by all sciences?
logic required by all sciences because
What is the difference of insulators and conductors?
Insulators: We define insulators as, A nonconducting material that provides electric isolation of two parts at different voltages. To accomplish this, an insulator must meet two primary requirements: it must have an electrical resistivity and a dielectric strength sufficiently high for the given application. The secondary requirements relate to thermal and mechanical properties. Occasionally, tertiary requirements relating to dielectric loss and dielectric constant must also be observed. A complementary requirement is that the required properties not deteriorate in a given environment and desired lifetime. Conductors: We define conductors as, A substance or medium that conducts heat, light, sound, or especially an electric charge.For Example,Metal wires, cables, rods, tubes, and bus-bars For further information about conductors check out the following link: http://www.answers.com/Conductors
What is a good electrical conductor when melted and is a good insulator in its solid state?
Glass is a good conductor when melted. Most precision glass melters use gas burners to get the glass to a molten state, then they use electrodes immersed in the glass to electrically heat it to the required temperature.
Is a comb a conductor or a insulator?
Most plastic combs (like for combing your hair) would be classified as insulators. All materials conduct, however, the amount of voltage (i.e. electrical pressure) required to make a material conduct generally cause us to classify materials as either: 1. Conductors (e.g. copper, gold) 2. Insulators (e.g. air, mica, glass, Teflon - http://en.wikipedia.org/wiki/Electrical_insulation ) 3. Semi-conductors (e.g. Silicon (Si) and germanium (Ge) )
Is a comb a conductor or insulator?
Most plastic combs (like for combing your hair) would be classified as insulators. All materials conduct, however, the amount of voltage (i.e. electrical pressure) required to make a material conduct generally cause us to classify materials as either: 1. Conductors (e.g. copper, gold) 2. Insulators (e.g. air, mica, glass, Teflon - http://en.wikipedia.org/wiki/Electrical_insulation ) 3. Semi-conductors (e.g. Silicon (Si) and germanium (Ge) )
How good and bad conductors of heat are useful to us?
Substances that don't have the capacity to carry heat are called bad conductors of heat (or insulators ). Substances that have the capacity to carry heat are called good conductors of heat. As for electricity, it is very, much the same.
Why are glass and wood good insulators of electricity?
For Current(Electricity) to travel through an object valence electrons are required. Most metals have valence electrons hence are good conductors of electricity. In case of glass and wood free electrons are not present hence electricity does not flow through them.
Good conductor of insulator electricity is?
Conductors and Insulators are different concepts. Good Conductors for "general" purposes include copper, aluminum, lead, and tin. Gold is an excellent conductor, but generally only used when extremely fine contacts are required. Good insulators include many plastics, glass, and ceramics. "Moisture" is also a good conductor, and often bridges the gap between a good conductor and a good insulator which can be bad. However, there are times when say a saline solution would be specifically chosen for its conductive properties.
Can an insulator become a conductor?
Sometimes. In most materials, no. However, things like vacuum tubes and MOSFETs in electrical amplifying equipment will change between insulators and conductors based on a "control" voltage. Computers rely on this behavior for their most basic principles of operation. Technically, all insulators are conductors because they conduct electricity through them. The difference is that insulators conduct a lot less electricity. Thus, for a conductor to become an insulator, we would have to raise the electrical resistance to a level that we could consider "insulating". In most materials this can only be achieved by changing the temperature, and the temperature change required for this is impractical to a great degree. Almost all electrical devices, however, rely on the ability of electrical switches to change from insulator to conductor to insulator again at will. Depending on the voltage applied to the "control" part of a MOSFET transistor, its resistance could be extremely high (several thousand or million ohms) or extremely low (about 0.08 ohms). Also the voltage will have a great deal to do with it. At a high enough voltage some material may brake down and conduct a large amount of current, llike a zener diode.
In a corrosive environment where a conductive metal is required is brass or stainless steel better?
Brass has better conduction than stainless steel. being roughly 65 percent copper which is one of the best conductors (thermal and electrical)
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