Question $1$

Balls $1,2,3,$ and $4$ are hanging by strings. A plastic rod, which has been rubbed with wool, is used to touch Ball $1.$ When the balls are brought near each other, but not touching, the following is observed:

Ball $2$ is attracted to ball $3$

Balls $2$ and $4$ do not affect one another

Balls $2,3,$ and $4$ are attracted to ball $1$

What is ball $3\text{'}$s charge state?

Glass

Plastic

Neutral