(1) The AC frequency is different.
The frequency of strong electricity is generally 50Hz, which is called "power frequency", which means the frequency of industrial electricity. The frequency of weak current is often high frequency or ultra-high frequency, which is measured by KHz and MHz.
(2) Different transmission modes
Strong electricity is transmitted through transmission lines, and weak electricity is transmitted through wires or wireless. Radio is transmitted by electromagnetic waves.
(3) Power, voltage and current are different.
Strong electric power is measured in KW (kilowatt) and MW (megawatt), voltage is measured in V (volt) and KV (kilovolt), and current is measured in A (ampere) and kA (kiloampere); Weak current is measured in W (Watt) and mW (Milliwatt), voltage in V (Volt) and mV (Millivolt), and current in mA (mA) and uA (Microampere), so its circuit can be composed of printed circuit or integrated circuit.
Extended data strong electricity refers to the electric part in the electric field. It is characterized by high power, high current and low frequency, mainly considering the problems of low loss and high efficiency. It is closely related to weak current, as opposed to weak current.
Source: Qiangdian _ Baidu Encyclopedia