1. used in radio receivers and transmitters for tuning frequencies.
2.used in oscillators for PHASE shift
3.for power factor improvement in case of transmission lines, motors etc
4.used in ac motors along with resistor for speed control of the motor
5.IN INTEGRATED CIRCUITS AND OP-AMPS FOR BLOCKING DC CURRENT
http://en.wikipedia.org/wiki/Application...
http://answers.yahoo.com/question/index?...
http://www.kpsec.freeuk.com/capacit.htm
It is one of major parts requires in those functions or circuits.......
Filter for high pass,low pass,band pass
Decoupling from the bad effect comes from power source links.
Oscillating for most existed frequencies.
Tuning for transmitter and receiver
Coupling from stage to stage
Too many to tell.........
For AC circuits, especially in amplifier circuits, it is used to isolate DC components and allow AC components to pass though!
Sorry no comment.
enumerate at least 3.