How to distinguish the positive and negative polarities of the multiplayer ceramic chip capacitors? (II)

Conversely, the leakage current of the electrolytic capacitor increases (the leakage resistance decreases). In this way, we first assume that a certain pole is a “+” pole, an analog multimeter uses an R*100 or R*1K gear, and then the assumed “+” pole is connected to the black meter of the multimeter, and the other electrode is related to the red meter of the multimeter. Then, note the scale at which the hands are stopped (the left hand has a large leftward resistance value). (For a digital multimeter, read the readings directly.) Then discharge the capacitors (two leads touch), and then repeat the two test pens and retry. measuring. In the two measurements, the position where the hands were last left was (or the resistance was large), and the black pen was the positive electrode of the electrolytic capacitor.

One is a common tantalum capacitor, which is in the shape of a rectangular parallelepiped. The end with the "-" mark is positive. There is also a silver surface mount capacitor, which is supposed to be aluminum electrolytic. The top is round and the bottom is square. It is common on optical drive boards. This type of capacitor has negative "-" marks.