Step 1 : Introduction to the question " In an electronics circuit, what does a capacitor do? "
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There are many different types of capacitors for different purposes, but as the name implies they all do basically the same thing. A capacitor holds a certain capacity of electricity.
Imagine a water tank with a valve that will only open when the tank is full. When the tank gets full, the valve opens and empties the tank, That is exactly what a capacitor does with electricity.
The amount of electricity a capacitor can hold is measured in microfarads, written as µF. The higher the value of µF, the more electricity the capacitor can hold before releasing it.
One of the most common uses for capacitors is filtering. They can also be used to make a light flash or a buzzer intermittently buzz. Do you know that flashing colon on a digital clock? It is done with a capacitor.
The most common type of capacitor is an electrolytic capacitor (shown in the photo). These can be dangerous to work with. There is a voltage limit and they can only be connected one way. These contain an electrolytic liquid compound that is acidic. If one of these capacitors is overloaded or connected incorrectly, the electrolytic compound with heat up, and the capacitor will explode causing the acidic liquid to splash out. It is recommended to wear eye protection and gloves when working with electrolytic capacitors.
More Info:
en.wikipedia.org
Step 2 : Answer to the question " In an electronics circuit, what does a capacitor do? "
Increases voltage:
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