What the purpose of capacitor?

Answer 1

Phase difference.

Answer 2

A Capacitor blocks DC voltage, but passes AC voltage. Larger capacitors can store power for a short amount of time, for example, allowing consumer electronics to retain their settings while the battery is changed.

Capacitors are most often used to "smooth" the supply voltage to circuits that have large transients, i.e. frequent moderate current surges. The capacitor between the supply and ground stores enough energy to supply the short requirements, allowing for smaller wires/traces on the circuit and still keep the supply voltage constant.

Capacitors are also used with inductors or resistors to create oscillators. The frequency of oscillation is based on the time it takes for the charge of the capacitor to deplete into the inductor or resistor.
A Capacitor is used to improve the power factor of the three phasor electrical in Industrial that can improve the real power.

Answer 3

• filter DC power supplies
• block DC to allow measuring pure AC
• analog timing
• analog integrator
• analog differentiator
• digital signal speedup
• digital signal slowdown
• signal coupling between stages
• bypass
• RF tuning
• etc.

Answer 4

To store charge .. and discharge it as per the requirement of the system.

Large capacitors (several 10's or hundreds of microfarads) are used to smooth out DC votages. The short term storage evens out dips in the supply caused by drains on the system and interference.

Small values can act with a coil, and cause alternating charge and discharge, at a resonant frequency to form tuned circuits for radio.

All capacitors consistof two isolated parallel plates, they can therefore effectively stop a DC voltage, but allow an alternating signal through.

Answer 5

capacitor used to maintain voltage profile constant. A capacitor has the ability to block DC from being transfer trough