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Electrolytic capacitors can only be biased by one polarity of the voltage.

I am having a hard time understand how to connect a electrolytic capacitor to a voltage source.

The symbol of a electrolytic capacitor is:

schematic

simulate this circuit – Schematic created using CircuitLab

and when I see a electrolytic capacitor I have something like this:

Now there is a strip with a - sign on it so I guess that side of the capacitor will go to the lower voltage correct?

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  • \$\begingroup\$ duckduckgo.com/… \$\endgroup\$
    – jsotola
    Commented Mar 12, 2022 at 18:18
  • \$\begingroup\$ As others have noted, the symbol you show is incorrect. That is the symbol for a variable capacitor. \$\endgroup\$
    – user57037
    Commented Mar 12, 2022 at 18:20

2 Answers 2

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Yes, correct. On the picture you posted the dashes indicate the negative terminal of the capacitor, and the other is the positive terminal.

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  • \$\begingroup\$ The negative terminal is also the shorter leg (assuming no one has been at it with side-cutters yet!). \$\endgroup\$
    – Rohan
    Commented Mar 13, 2022 at 3:09
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The symbol you have shown is incorrect.

Here's the correct one.

enter image description here

On the component, however, the -ve terminal is marked.

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  • \$\begingroup\$ This is the correct symbol, but often the '+' is omitted. \$\endgroup\$
    – user57037
    Commented Mar 12, 2022 at 18:18
  • \$\begingroup\$ 62 years ago the positive terminal of an electrolytic capacitor was marked "+" and the negative terminal was not marked. \$\endgroup\$
    – Audioguru
    Commented Mar 12, 2022 at 21:16

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