Youtube + Adsense questions

Hello, i want to apply AdSense in my channels. So beforethat, I'd like to discuss some issues.
Lets say there are more YT channels, using whitehat and blackhat methods.

1. Should i regist AdSense on the same Gmail account as one of my YT channel, or on the another?
2. Should i use more AdSense accounts?



Thanks

Adsense allows 1 account only
and you can make Channel with any email.

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Thanks