Where can I find active chat rooms to learn electronics from professionals and experts?

Any chat room is there to learn electronics to me electronics professional /experts?Plz suggest me... I'm much worried of not understanding the concepts...

Yes; I have been looking for the same thing.
It generally seems to me that the field is rather limited on free personnel assistance.

Maybe we can help each other out. I'll send you a message

To obtain an understanding of electronics, the following sites offer free courses of instruction and advice for beginners. Have look at a few, and discover which one(s) suit your approach. Start with simple projects and work your way up.

Many sites have a user forum for asking questions.

We will always be here to offer the best advice and wisdom we can.
Old (allegedly Chinese) proverb:
“A journey of a thousand miles begins with but a single step.”

http://www.allaboutcircuits.com
series of online textbooks covering electricity and electronics

www.learnabout-electronics.org/index.php
Descriptions of components and principles, good diagrams, animations, & fault-finding techniques

http://www.satcure-focus.com/hobby/index.htm
Useful range of ideas tutorials circuits links etc

http://electronics-for-beginners.com/links.php

http://www.hobby-hour.com/electronics/
Teaching from basic principles, resistor code calculators, projects

http://www.radio-electronics.com
Useful information and tutorials

http://www.electronics-tutorials.ws/index.html
Plus calculators & tools