What Is High Resistance In Electricity

Copper has a low resistance and wood has a high resistance.

What is high resistance in electricity.

A high resistance connection hrc is a hazard that results from loose or poor connections in traditional electrical accessories and switchgear which can cause heat to develop capable of starting a fire. Heat comes from power dissipation. A short circuit is an electric circuit offering little or no resistance to the flow of current. The property of high electrical resistance has important applications in electrical and electronic devices.

A high electrical resistance of an electrical conductor is the opposition to the flow of an electric current through that conductor. The lower the resistance the higher the current flow. The si unit of electrical resistance is the ohm o. When beginning to explore the world of electricity and electronics it is vital to start by understanding the basics of voltage current and resistance.

Substances in which electricity can flow are called conductors a piece of conducting material of a particular resistance meant for use in a circuit is called a resistor conductors are made of high conductivity materials such as metals in particular copper and aluminium resistors on the other hand are made of a wide variety of materials depending on factors such as the desired resistance. The higher the resistance the lower the current flow. The unit of electrical resistance is the ohm and it is represented by ω. Glowing connections occur when relatively high current exists in a relatively large resistance object.

These are the three basic building blocks required to manipulate and utilize electricity. The most extensively used high working temperature resistance materials are alloys of nickel chromium and iron called nichrome and alloys of aluminium iron and chromium. All conductors give off some degree of heat so overheating is an issue often associated with resistance. Resistance is the measure of opposition to electric current.

At first these concepts can be difficult to understand because we cannot see them. The inverse measure is known as electrical conductance. If abnormally high one possible cause among many could be damaged conductors due to burning or corrosion. Resistance is a measure of how much an object opposes the passage of electrons.

Because of its high cost platinum is used in laboratory electric furnaces with a working temperature of 1300 c.