English    中文

# Current calculator online calculation tool

Category:

The resistance of the conductor is usually represented by the letter R. The unit of resistance is ohm, referred to as Europe, and the symbol is Ω (Greek letter, transliterated into pinyin read as ōu mī ga ), 1 Ω = 1 V / A. Larger units have kilo ohms (kΩ) and megohms (MΩ) (mega = millions, or 1 million).

The basic unit of current is ampere, and 1 amp is defined as: two infinitely long parallel straight conductors separated by 1 m in vacuum, with equal constant current, when the force per metre of conductor is $$2×10^-7N$$, the current on each wire is 1 ampere.

The main unit of voltage in the International System of Units is volts (V), referred to as volts, denoted by the symbol V. [1] 1 volt is equal to 1 joule of work per volt of charge on the voltmeter, ie 1 V = 1 J/C. Strong voltages are commonly used in kilovolts (KV), and weak voltage units can be in millivolts (mV) microvolts (μv).

$$current (A)= \frac {V}{R}$$

Note: Resistance refers to pure DC resistance. This calculator can not calculate the inductive load resistance of the motor, transformer and other results.