What is a 5v charger
5v charger refers to the charging voltage of the 5v charger. 5V chargers are generally common in small electronic devices, such as smartphones, MP3s, MP4s, tablets smaller than 7 inches, etc.; mainly because their electronic components and screens are small, and the power consumption is also controlled to a certain extent.
The operating environment of this tutorial: HarmonyOS 2 system, HONOR V30 mobile phone.
5V refers to the voltage used when charging a device. 5v charger refers to the charging voltage of the 5v charger.
5V/1A means the voltage is 5 volts and the maximum current is 1 amp. Maximum power 5 watts. 5V chargers are generally common in small electronic devices, such as smartphones, MP3 players, MP4 players, and tablet computers smaller than 7 inches. Mainly because its electronic components and screen are smaller, and the power consumption is also controlled to a certain extent.
# Voltage can essentially be understood as a force on charges (similar charges repel and different charges attract). Since the positive electrode of the power supply has accumulated a lot of positive charges, and the negative electrode has accumulated a lot of negative charges, there is an electric field between the positive electrode and the negative electrode.
The potential of the battery only depends on the solution The concentration of reactants and products. This means that if you use the same material, no matter how big the battery you make, as long as the concentration of the reactant liquid in the battery is the same, the voltage of the battery will be the same. Corresponding to the picture I gave above, the concentration of the reactant liquid in the battery corresponds to the height difference of the pool, and the amount of reactants corresponds to the size of the pool.
Voltage, current and resistance are in compliance with Ohm's law. For a circuit with a certain resistance, the voltage and current at both ends of the resistor are proportional. In the constraint relationship of Ohm's law, Keeping any one quantity constant, the other two quantities are functional relationships with each other.
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