The net electric force acting on each of the three objects below is sketched as a green arrow. For example, if the green arrow points to the left the object feels a net electric force pushing it to the left. If there is no green arrow, the object feels no net electric force.

Use this information to assign an electric charge to each object. That is$,$ decide whether each object has a positive electric charge, a negative electric charge, or is neutral.

Note for advanced students: there may be more than one correct answer.