in alternator what is use of AVR ? how AVR is operating either AC or DC?

in alternator how we can give power to rotor ? its power is AC or DC ?

Brushed alternator is also called dc generator ? its true or false ?explain it ?

what is the working principle of Brushed alternator ? without exictation how we can give dc supply to rotor ?

what is meant by Back emf ?where its occur ?

what is the working principle of DC generator ?

DRDL, HCL,

In zero voltage we can pass supply to our body means we cant get shock its true ? how we can do it ?

what is the difference between brushed alternator ,brushless alternator & permanent alternator ?

what is meant by brushed alternator & its working principle ?

hi friends iam electrical engineer ,iam interesting to know about the, working principle of aeroplane ,so anybody please refer me the apt book or websites for learn about it

how we can produce negative DC voltage ? please explain it .,thank u

hi frnds what is meant by harmonics & what is meant by third hormonics,where its will occur ?thank u

in science exhibition how lamp can blink when you clap near the lamp ? thank you

hi friends how 3 phase converter functioning ?what is working principle of rotory phase converter ?

what is the principle of switch gear? where its function ?