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阿波姆 (abΩ) 单位定义
The abohm is the derived unit of electrical resistance in the emu-cgs (centimeter-gram-second) system of units where emu stands for electromagnetic units. One abohm is equal to 10−9 or 0.000000001 ohms (Ω) in the SI system of units. In other terms one abohm is equivalent to a nanoohm (nΩ). The abohm is represented by the symbol abΩ.
概述
The emu-cgs or electromagnetic cgs units are one of several systems of electromagnetic units within the centimeter (cm) gram (g) second (s) system of units. Other units include esu-cgs, Gaussian units, and Lorentz–Heaviside units. In these other systems, the abohm is not one of the units. When a current of one abampere (abA) flows through a resistance of 1 abohm, the resulting potential difference across the component is one abvolt (abV).
历史
abohm 这个名字是由 Kennelly 在 1903 年引入的,作为自 1875 年采用 cgs 系统以来一直使用的长名称绝对电磁 cgs 电阻单位的简称。abohm 与 emu-cgs 系统相一致,相比之下对欧姆来说,1875 年也采用了实际的电阻单位。
转换
The siemens (S) is the SI derived unit of electric conductance and admittance, also known as the mho (ohm spelled backwards, symbol is ℧). It is the reciprocal of resistance in ohms (Ω).
功率作为电阻的函数
The power dissipated by a resistor may be calculated from its resistance, and the voltage or current involved. The formula is a combination of Ohm's law and Joule's law where: P = V ∙ I = V2⁄R = I2 ∙ R. Where:
P是幂
R是电阻
是电阻两端的电压
是通过电阻器的电流
A linear resistor has a constant resistance value over all applied voltages or currents. Many practical resistors are linear over a useful range of currents. Non-linear resistors have a value that may vary depending on the applied voltage (or current). Where alternating current is applied to the circuit (or where the resistance value is a function of time), the relation above is true at any instant but calculation of average power over an interval of time requires integration of instantaneous power over that interval.
由于欧姆属于相关的单位系统,当这些量中的每一个都有其对应的SI单位(P代表瓦特,R代表欧姆,V代表伏特,I代表安培时,这个公式在数值上仍然有效当这些单位被使用时(并被认为被取消或省略)。
Other Electric Resistance Unit Definitions
- 阿波姆 (abΩ)
- 阿托欧姆 (aΩ)
- 厘欧 (cΩ)
- 十欧 (daΩ)
- 分欧 (dΩ)
- Dekaohm (daΩ)
- 艾欧 (EΩ)
- 飞欧 (fΩ)
- 千兆欧姆 (GΩ)
- 百欧 (hΩ)
- 千欧 (kΩ)
- 兆欧 (MΩ)
- 微欧 (μΩ)
- 毫欧 (mΩ)
- 纳欧 (nΩ)
- 欧姆 (Ω)
- Petaohm (PΩ)
- 皮欧 (pΩ)
- Quectoohm (qΩ)
- Quettaohm (QΩ)
- Ronnaohm (RΩ)
- Rontoohm (rΩ)
- Statohm (statΩ)
- 太欧 (TΩ)
- 伏特/安培 (V/A)
- Yoctoohm (yΩ)
- 约塔姆 (YΩ)
- Zeptoohm (zΩ)
- 泽塔欧姆 (ZΩ)
转换为另一个电阻单位
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来源
“Ohm.” Wikipedia, Wikimedia Foundation, 4 June. 2020, en.wikipedia.org/wiki/Ohm.