Those with positive and negative electrodes are DC low-frequency capacitors; No positive and negative electrode is the AC high frequency capacitor. The biggest characteristic of the capacitor is the separation through the cross, according to the location and need to choose different capacitors, different roles in different parts. The power supply is DC, but the signal is alternating. The functions of capacitors on the motherboard usually include filtering, coupling, bypass, oscillation, delay, reset, and so on.
Ceramic refers to the isolation medium, electrolytic capacitor, the two poles are not the same, the positive electrode is a metal film with an oxide film, and the negative electrode is directly connected to the electrolyte with a metal, because the electrolyte is negative, so it is a negative electrode.
There must be a positive and negative electrode, the shell above the \"-\" is a negative electrode, the other is a positive electrode
DC capacitors have no positive and negative electrodes