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Do capacitors have positive and negative terminals?

What are electrolytic capacitors? In what way they are different from normal capacitors? The charge on a capacitor depends on how i connect it to battery,but electrolytic capacitors have one long and short terminal to differentiate between positive and negative terminal. Why?

5 Replies

kelseymh (author)2012-04-14

So read about it, and do your own research. You will learn more, and most importantly, you will learn how to learn more.

rickharris (author)2012-04-13

Some capacitors are polarised - They have a + and - terminal electrolytic are an example.

Awesome-aniac (author)rickharris2012-04-13

Correct, some are polarized, and some are not.

kelseymh (author)2012-04-13

Try reading about it. We aren't here to do your homework for you.

steveastrouk (author)2012-04-13

Electrolytic capacitors are the best way to get a lot of capacitance in small space. They work by creating an anodic film on aluminium foil. Driven the right way, the anodic film doesn't break down.