Ohm Converter
Convert Ohm to Abohm and more • 68 conversions
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Unit Explanations
OhmΩ
Source UnitThe ohm (Ω) is the SI unit of electrical resistance, named after the German physicist Georg Simon Ohm. It is defined as the amount of resistance that allows a current of one ampere to flow when a voltage of one volt is applied across it. This relationship can be expressed mathematically using Ohm's Law, which states that V = IR, where V is the voltage in volts, I is the current in amperes, and R is the resistance in ohms. The ohm is a crucial unit in electrical engineering and physics, as it enables the quantification of how much a material opposes the flow of electric current, thus playing a vital role in circuit design and analysis.
Current Use
The ohm is widely used in various industries, including electronics, telecommunications, and electrical engineering. In electronics, components such as resistors are rated in ohms, indicating their resistance to current flow. For instance, in telecommunications, understanding resistance is crucial for signal integrity and transmission quality over cables. In power systems, the measurement of resistance helps in assessing the efficiency of electrical circuits. Countries around the world, including the United States, Germany, and Japan, utilize the ohm in both academic and practical applications, ensuring that electrical specifications adhere to international standards, thus promoting safety and interoperability in electrical designs.
Fun Fact
Georg Simon Ohm was initially a teacher and faced many challenges before his work gained recognition.
AbohmabΩ
Target UnitThe abohm is a unit of electrical resistance in the electromagnetic system of units defined in the centimeter-gram-second (CGS) system. Specifically, it is defined as the resistance through which an electromotive force of one abvolt will cause a current of one abampere to flow. Thus, 1 abohm equals 10^-9 ohms. The abohm is primarily used in contexts where CGS units are prevalent, such as in certain scientific fields and some engineering applications. As a smaller unit of resistance, it is particularly useful for expressing very low resistances, which are common in superconductors and various sensitive electronic components. The abohm is part of the broader electromagnetic system of units, where the relations between electric and magnetic phenomena are described in CGS units.
Current Use
The abohm is primarily used in certain specialized fields of physics and electrical engineering, particularly in contexts where the CGS unit system is still in use. While most modern applications have transitioned to SI units, the abohm can still be encountered in research related to superconductivity, where extremely low resistances are prevalent. Laboratories that conduct experiments in electromagnetism may also utilize the abohm for calculations that require precision in low-resistance measurements. Countries such as the United States and Germany, which have strong research communities in physics and engineering, may still reference the abohm in academic publications or technical papers. The continued existence of the abohm serves to bridge the gap between historical measurement practices and contemporary standards.
Fun Fact
The abohm is named after Georg Simon Ohm, who is famous for formulating Ohm's Law.
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Ohm
electric • SI Unit
Definition
The ohm (Ω) is the SI unit of electrical resistance, named after the German physicist Georg Simon Ohm. It is defined as the amount of resistance that allows a current of one ampere to flow when a voltage of one volt is applied across it. This relationship can be expressed mathematically using Ohm's Law, which states that V = IR, where V is the voltage in volts, I is the current in amperes, and R is the resistance in ohms. The ohm is a crucial unit in electrical engineering and physics, as it enables the quantification of how much a material opposes the flow of electric current, thus playing a vital role in circuit design and analysis.
History & Origin
The term 'ohm' was established in 1861 during the International Electrical Congress in Paris, where it was named in honor of Georg Simon Ohm, who published his pivotal work, 'Die galvanische Kette, mathematisch bearbeitet' (The Galvanic Circuit, Mathematically Treated) in 1827. Ohm's work laid the groundwork for understanding the relationship between voltage, current, and resistance, which became fundamental to electrical engineering. The adoption of the term helped standardize the unit of resistance across different scientific and engineering disciplines.
Etymology: The word 'ohm' is derived from the surname of the German physicist Georg Simon Ohm, reflecting his contributions to the field of electrical resistance.
Current Use
The ohm is widely used in various industries, including electronics, telecommunications, and electrical engineering. In electronics, components such as resistors are rated in ohms, indicating their resistance to current flow. For instance, in telecommunications, understanding resistance is crucial for signal integrity and transmission quality over cables. In power systems, the measurement of resistance helps in assessing the efficiency of electrical circuits. Countries around the world, including the United States, Germany, and Japan, utilize the ohm in both academic and practical applications, ensuring that electrical specifications adhere to international standards, thus promoting safety and interoperability in electrical designs.
💡 Fun Facts
- •Georg Simon Ohm was initially a teacher and faced many challenges before his work gained recognition.
- •The ohm is one of the few SI units named after a person, reflecting the historical significance of Ohm's contributions.
- •In certain conditions, materials exhibit superconductivity, where resistance drops to zero, a phenomenon not explained by traditional ohmic principles.
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Abohm
electric • Non-SI
Definition
The abohm is a unit of electrical resistance in the electromagnetic system of units defined in the centimeter-gram-second (CGS) system. Specifically, it is defined as the resistance through which an electromotive force of one abvolt will cause a current of one abampere to flow. Thus, 1 abohm equals 10^-9 ohms. The abohm is primarily used in contexts where CGS units are prevalent, such as in certain scientific fields and some engineering applications. As a smaller unit of resistance, it is particularly useful for expressing very low resistances, which are common in superconductors and various sensitive electronic components. The abohm is part of the broader electromagnetic system of units, where the relations between electric and magnetic phenomena are described in CGS units.
History & Origin
The abohm originated as part of the centimeter-gram-second (CGS) system, which was developed in the 19th century as a natural progression from earlier measurement systems. The CGS system was widely adopted in scientific research and engineering, particularly in fields related to electromagnetism. With the establishment of the International System of Units (SI) in the mid-20th century, the CGS system began to be phased out, with the ohm becoming the standard unit of resistance. However, the abohm continues to be referenced in specific contexts, particularly in physics and engineering involving low resistance measurements.
Etymology: The term 'abohm' combines the prefix 'a-' from the CGS system, indicating 'absolute' or 'electromagnetic', and 'ohm', named after the German physicist Georg Simon Ohm, who formulated Ohm's Law.
Current Use
The abohm is primarily used in certain specialized fields of physics and electrical engineering, particularly in contexts where the CGS unit system is still in use. While most modern applications have transitioned to SI units, the abohm can still be encountered in research related to superconductivity, where extremely low resistances are prevalent. Laboratories that conduct experiments in electromagnetism may also utilize the abohm for calculations that require precision in low-resistance measurements. Countries such as the United States and Germany, which have strong research communities in physics and engineering, may still reference the abohm in academic publications or technical papers. The continued existence of the abohm serves to bridge the gap between historical measurement practices and contemporary standards.
💡 Fun Facts
- •The abohm is named after Georg Simon Ohm, who is famous for formulating Ohm's Law.
- •One abohm is equivalent to one billionth of an ohm, highlighting its use for extremely low resistance.
- •The CGS system, which includes the abohm, was widely used before the adoption of the SI system.
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