Question

A suspended object A is attracted to a neutral wall. It's also attracted to a positively-charged object B. Which of the following is true about object A? a. It is uncharged. b. It has a negative charge. c. It has a positive. d. It may be either charged or uncharged.

Answer 1

There are two particular cases, the first is when Object A is attracted to the neutral wall. This would indicate that the object is not neutral, as there is an attraction.

At the same time we know that Object A is attracted to an object B. And therefore, the load of A must be opposite to that of B. Remember that opposite charges attract each other. If the charge of object B is positive, then the charge of object A will be negative.

Option B is correct: It has a negative charge.