When you are asking a “real” question (i.e. you don’t know the answer, as opposed to you needing to hear the answer again) your voice should fall at the end of the question.
Where do you live?
(with falling intonation on live)
What’s your name?
(with falling intonation on name)
If you find it difficult to make your voice fall at the end, try putting the stress on the important words (such as where, live, what and name) instead.
You can hear examples of this in this exercise:
Going to the Chemist
Can you tell me how often I need to take this medicine?
Can you give me some advice about cough medicine?