How can you tell if an electroscope is charged?

Question

A the leaves are together
B. The leaves have 1 pointing down and 1 pointing out
C. both leaves are separated

Answer 1

C. Both leaves are separated.

When an electroscope is charged, the leaves will repel each other and spread apart. If the electroscope is uncharged, the leaves will tend to hang straight down and be together. Therefore, when you see that both leaves are separated, it indicates that the electroscope is charged.