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Do capacitors have positive and negative terminals? Answered

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?

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

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.