Isse mains ho jaega?

I have no idea about potential and capacitance. I've never studied it. 12th mein thoda padha tha but kabhi samjh nhi aya , darr aur baith gaya is chapter ka. Electric charges ho gaya . Ye oneshot se samjh aa jaega aur pyqs bann jaenge? Abhi buss mains ke liye chahiye . Rajwant sir ke lecs hai par bohot lengthy hain abhi ke liye. Thank you.