Question

How do capacitors increase voltage?

Answer 1

Hint: You could recall some relation that relates the voltage with the capacitance and charge of a capacitor. Then you could see which among them remains constant for a given capacitor. We define voltage as the amount of potential energy between two points on a circuit. One point has more charge than another. This difference in charge between the two points is called voltage.

Complete step by step answer:
The energy stored in a capacitor can be expressed in terms of work done by the capacitor while charging as given by the relation. Storing energy on the capacitor involves doing work to transport charge from one plate of the capacitor to the other against the electrical force so the two terms are related.
Capacitors are used to store charges and capacitors alone cannot increase the voltage. Capacitors are connected along with diodes to form the voltage multiplier circuit. Capacitors can be used in many circuits where the output voltage has to be more than the input voltage. When a capacitor is connected to the half-wave rectifier and full-wave rectifier the output DC voltage is increased.

Note:
 It should be remembered that voltage can affect a capacitor, but a capacitor cannot affect the voltage. Capacitor is a physical object (like a metal spring or rubber band). Voltage can break a capacitor, but a capacitor cannot break voltage. A capacitor's ability to store energy as a function of voltage (potential difference between the two leads) results in a tendency to try to maintain the voltage at a constant level. In other words, capacitors tend to resist changes in voltage drop.