It is difficult to set a hard limit on how "entry-level" a question should be allowed. Ideally, if asked in good faith, there should be no lower limit. All questions are welcome. But it is reasonable to require some small sense of due diligence from the original author. Simple questions, good; Lazy questions, bad.
The question has to be taken in context. It is very likely that questions posed the way you quoted are not being asked in good faith. I would urge everyone to read this blog post: Asking the First Questions.
It has long been established that no question is too entry-level nor too basic. Everyone is welcome. But, in these earliest days, we are DESIGNING a site for experts. To attract experts, you need a site where people are asking very interesting and challenging questions, not the basic questions found on every other Q&A site. Remember, the pro sites WILL attract the enthusiasts, but not the other way around!
The earliest questions on a site will set the tone and topic of the site for a long time.
The blog post linked above talks about the issue of seeding the site with questions… in a bad way. No one who spent more than 10 seconds on their problem likely to craft a lazy question simply stated as "What is ohms law?" However, if a user comes along with a genuine problem, explaining it in sufficient detail, forming a well-thought-out question — even if the underlying question turns out to be extremely basic — it should be allowed.
As a matter of fact, it is the simplest questions that provide opportunities for the most thorough, thought-provoking answers. It should be answered with the most awesome answer you can muster. It should become THE canonical source for that information on the internet. That's what the site is for.