The independent clause is 'When the doorbell rang.'
It is an adverbial clause, modifying the verb 'was sleeping'.
"You rang the doorbell" is an indepent clause, because it can exist on its own. So is "but no one answered," because it is using a coordinating conjunction, which acts as a independent marker for an independent sentence. See https://owl.english.purdue.edu/owl/resource/598/01/.
Only an independent clause can stand independently. A dependent clause is dependent on an independent clause.
An independent clause stands alone.
An independent clause is a sentence that can stand on its own.
A complex sentence is a sentence that contains an independent clause and at least one dependent clause. The independent clause can stand alone as a complete sentence, while the dependent clause relies on the independent clause to make sense.
A clause can not stand alone in a sentence, whereas an independent clause can stand alone in a sentence.
This question is somewhat ambiguously phrased, because independent and dependent clauses are mutually exclusive categories, and a clause that is introduced by a subordinate conjunction is not independent by definition. However, substituting a coordinating conjunction in a independent clause by a subordinate conjunction can convert an initially independent clause into a dependent clause.
It can be an independent clause or a dependent clause. It is an independent clause if does not have a word at the beginning like "but" or "because". If there is a word like this at the beginning of the clause, it is a dependent clause.
A subordinate independent clause is a type of clause that has both dependent and independent qualities. It can function independently as a complete sentence but is usually part of a larger sentence and relies on another clause for context or meaning. This type of clause often begins with a subordinating conjunction.
Yes, it is. That is why it is called "a dependent clause." It is dependent upon the independent clause.
An independent clause can also be called a simple sentence.
Independent clause: "I went to the store." Dependent clause: "Because it was raining."