Conductors are materials having a l

Conductors are materials having a low resistance so that current easily passes through them. The lower the resistance of the material, the more current can pass through it.
Тhe most common conductors are metals. Silver and copper are the best of them. The advantage of copper is that it is much cheaper than silver. Thus copper is widely used to produce wire conductors. One of the common functions of wire conductors is to connect a voltage source to a load resistance. Since copper wire conductors have a very low resistance a minimum voltage drop is produced in them. Thus, all of the applied voltage can produce current in the load resistance. It should be taken into consideration that most materials change the value of resistance when their temperature changes.
Metals increase their resistance when the temperature increases while carbon decreases its resistance when the temperature increases. Thus metals have a positive temperature coefficient of resistance while carbon has a negative temperature coefficient. The smaller is the temperature coefficient or the less the change of resistance with the change of temperature, the more perfect is the resistance material.
Materials having a very high resistance are called insulators. Current passes through insulators with great difficulty. The most common insulators are air, paper, rubber, plastics. Any insulator can conduct current when a high enough voltage is applied to it. Currents of great value must be applied to insulators in order to make them conduct. The higher the resistance of an insulator, the greater the applied voltage must be.

Результаты (английский) 1:

Conductors are materials having a low resistance so that current passes easily through them. The lower the resistance of the material, the more current can pass through it.The most common conductors are metals. Silver and copper are the best of them. The advantage of copper is that it is much cheaper than silver. Thus copper is widely used to produce wire conductors. One of the common functions of wire conductors is to connect a voltage source to a load resistance. Since copper wire conductors have a very low resistance a minimum voltage drop is mass-produced in them. Thus, all of the applied voltage can produce current in the load resistance. It should be taken into consideration that most materials change the value of resistance when their temperature changes.Metals increase their resistance when the temperature increases while carbon decreases its resistance when the temperature increases. Thus metals have a positive temperature coefficient of resistance while carbon has a negative temperature coefficient. The smaller is the temperature coefficient or the less the change of resistance with the change of temperature, the more perfect is the resistance material.Materials having a very high resistance are the so-called supporting insulators. Current passes through the supporting insulators with great difficulty. The most common supporting insulators are air, paper, rubber, plastics. Any insulator can conduct current when a high enough voltage is applied to it. Currents of great value must be applied to the supporting insulators in order to make them conduct. The higher the resistance of an insulator, the greater the applied voltage must be.

Результаты (английский) 2:

Conductors are materials having a low resistance so that current easily passes through them. The lower the resistance of the material, the more current can pass through it.
The most common conductors are metals. Silver and copper are the best of them . The advantage of copper is that it is much cheaper than silver. Thus copper is widely used to produce wire conductors. One of the common functions of wire conductors is to connect a voltage source to a load resistance. Since copper wire conductors have a very low resistance a minimum voltage drop is produced in them. Thus, all of the applied voltage can produce current in the load resistance. Should the BE taken It Into Consideration That are most materials the change of value of the resistance the when Their temperature changes.
Metals Increase Their resistance the when the temperature Increases Decreases its' carbon 'while' the when the temperature resistance Increases. Thus metals have a positive temperature coefficient of resistance while carbon has a negative temperature coefficient. Products smaller is the of The temperature coefficient or the less See the change of the resistance with the change of the temperature, the more the resistance is by perfect material.
Materials the having a very the high resistance insulators are Called. Current passes through insulators with great difficulty. The most common insulators are air, paper , rubber, plastics. Any insulator can conduct current when a high enough voltage is applied to it. Currents of great value must be applied to insulators in order to make them conduct. The higher the resistance of an insulator, the greater the applied voltage must be.