Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between kiloohms and ohms. Type in your own numbers in the form to convert the units! The ohm is the SI derived unit for electrical resistance in the metric system. Ohm's Law states the current between two points on a conductor is proportional to the voltage and inversely proportional to the resistance. Using Ohm's Law, it's possible to express the resistance in ohms as an expression using current and voltage.
The resistance in ohms is equal to the potential difference in volts divided by the current in amperes. The answer is one Ohm is equal to 0. Feel free to use our online unit conversion calculator to convert the unit from Ohm to Kiloohm. Just simply enter value 1 in Agate Line and see the result in Kiloohm. By using our Ohm to Kiloohm conversion tool, you know that one Ohm is equivalent to 0.
Hence, to convert Ohm to Kiloohm, we just need to multiply the number by 0. Given the amount of production of such devices globally, we can estimate that there are tens of trillions of them. We could say that along with the other passive electronic components such as inductors and capacitors, resistors are part of the foundation of our civilization as we know — they are the metaphorical whales that our world rests on.
Electrical resistance is a physical quality of matter to resist the loss-free flow of an electric current through it. In electrical engineering, resistance is a property of an electrical circuit or its part, which prevents electric current from flowing freely through it.
It is calculated as a ratio of the potential difference voltage between two points of the circuit to the current that runs through the circuit. Electrical resistance is related to the transport and conversion of electrical energy to other types of energy. When the conversion from electrical energy to thermal energy is irreversible, we talk about resistance. On the other hand, when the electrical energy is reversibly converted into energy of a magnetic or an electric field, and if the alternating current runs through the circuit, we consider electrical reactance.
If there is a large amount of inductance in the circuit, then we consider inductive reactance, and if there is capacitance, then we talk about capacitive reactance. When we want to make sure to include both in our discussion of the behavior of circuits with alternating current, we talk about electrical impedance, which combines the specific case of resistance discussed above and capacitive and inductive reactance.
When we discuss electromagnetic fields and electromagnetic waves, then we talk about wave impedance. Resistance can be denoted by the letter R or r , and is considered a constant for a given conductor within specific limits. It can be found as:. U is the potential difference or voltage between the ends of the conductor, measured in volts V ;. There is another important law that describes the discharge of heat energy when an electric current passes through a conductor.
Q is the amount of heat discharged during a given time t, where the energy is measured in joules J ;. You can see how ohms relate to other units by using the unit converter on our website. Georg Simon Ohm was an outstanding physicist, among the first to research electrical resistance.
In one of his works published in , he stated the famous law named after him that describes the relationship between the potential difference, electric current, and resistance. This discovery had a tremendous impact on the research of electricity and on the development of methods to use it in daily life and in the industry.
Unfortunately, in the beginning, his contemporaries did not grasp the importance of his work, and he was, in fact, made to resign from his post of a mathematics teacher in Cologne for publishing the results of his work in the local papers. He was finally recognized for his contributions to physics when he was awarded the Copley Medal on the 30th of November, by the Royal Society of London.
In it was suggested during the International Exposition of Electricity in Paris that the unit of electrical resistance is named after him. All of the materials are divided according to their relative resistance into conductors, semiconductors, and dielectrics.
There is also a special separate class for materials, the resistance of which is zero or near to zero. They are called superconductors. Some of the most common examples of conductors are metals, although their resistance can be within a rather wide range, depending on the properties of their crystal lattice. Currently, we think that atoms of metals form a crystal lattice. The relatively low resistance of metals has to do with their composition — they have as part of their structure a large number of conductivity electrons, which are charge carriers for the atoms that the material is composed of.
An external electric field causes the electrons to move in a systematic way, and this motion causes an electric current to flow through the material. The electric field accelerates the electrons, and they then collide with the ions of the crystal lattice.
These collisions change the momentum of the electrons. As a result, they lose some of their kinetic energy, because it is converted into the energy stored in the crystal lattice. This stored energy causes the conductor to warm up as the electric current runs through it. It is important to note that the resistance of a given metal or an alloy depends on its geometry and does not depend on the direction of the external electric field that is applied to this material.
As this external field intensifies, the electric current that runs through the metal increases, and more and more heat is emitted. This heat may increase so much that it will melt the metal. Fuses that have a wire component use this property. The wire melts if the heat exceeds the pre-set standards, as determined by the melting point of the material chosen for the wire. The melted wire interrupts the current flow in the electric circuit.
We can get an idea of what happens to fuses in action if we look at photographs or videos of filament failure in an incandescent light bulb. The most common use for electrical resistance is its use as a heating unit.
We use this property while cooking and heating food on electrical stoves, baking bread and cakes in electrical ovens, and also when working with electric kettles, coffee makers, washing machines, and electric irons. We rarely acknowledge this in our everyday life, but we owe our comfort to electrical resistance, whether we turn on the water heater for our shower, an electric fireplace, or an air conditioner with a heater function to heat our room.
All of these devices have a heating element that uses electrical resistance. Electrical resistance is used in the industry for drying when creating processed foods, to facilitate ideal temperatures for chemical reactions when making medicine, plastic bags, or for creating products from plastics using the process of extrusion.
Unlike the case with metals, the crystalline structure of semiconductors is formed due to covalent bonds between atoms of the semiconductor. Because of this, semiconductors in their pure form without other materials mixed into them have a higher electrical resistance than do metals. We should note that when talking about semiconductors we usually consider their intrinsic conductivity, not their resistance.
When we mix the semiconductor material with another material that has atoms with a larger number of electrons on the outer electron shell, the semiconductor becomes n-type because of the extrinsic conductivity.
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