wasee

I dont understand how electricity is actually produced and what is current etc.

How do calculators (and computers) add ,subtract etc.? I know it is done through code but how? I shall be grateful if someone helps me understand these very basic ideas.

Would someone like to teach me some of the basic concepts which have been confusing me since i was first introduced with Chemistry?

Some of the concepts of Chemistry are still very hard for me to understand like the orbital concept of orbital hybridisation, ionization like things.Can somebody help me?