Question

two balloons are hung from the ceiling by threads. balloon a is negatively-charged. balloons a and b attract each other. balloon b does not interact with neutral paper bits. balloon b is ... positive negative neutral tap buttons to select and deselect answers. select all answers that could apply.

Explanation:

• Opposite charges attract. Since balloon A is negatively - charged and balloons A and B attract each other, balloon B could be positively - charged.
• A charged object (either positive or negative) will attract neutral paper bits due to electrostatic induction. Balloon B does not interact with neutral paper bits, so balloon B is not charged. But wait, if balloon B was neutral, it would still be attracted to a charged balloon A (a charged object can attract a neutral object). However, the fact that balloon B does not interact with neutral paper bits is a red - herring. The key is the interaction between A and B. Since A is negative and they attract, B must be positive. (If B was neutral, it would be attracted to A, but the problem says "Balloon B does not interact with neutral paper bits" which is just extra information. The main rule is opposite charges attract. Since A is negative, B must be positive to attract A)

Answer:

Positive