What is the difference?
What is the difference between:

어디에 있어요?

AND

어디에 요?

감사합니다

Question

What is the difference?
What is the difference between:

어디에 있어요?

AND

어디에 요?

감사합니다

Answer

"- 은/는 어디에 있어요?" is used when you ask where persons, things or places are or are located whereas "어디예요" only works for people and places.^^/

for persons,
오빠는 어디에 있어요? 
= 오빠, 어디예요? ("어디예요" doesn't need topic particles 은/는)

for places,
명동은 어디에 있어요?
= 명동은 어디예요?(here, "어디예요?" need topic particles)

for things,
사과는 어디에 있어요?
사과는 어디예요?(X)

\^o^/

Answer

I asked this once and got some good answers.

http://www.italki.com/answers/question/90995.htm

Answers · 4