Question

triboelectric charging
paulinus ufondu
open - ended question
describe how you can tell the charges of two objects that are charged as a result of triboelectric charging.

Explanation:

Triboelectric charging occurs when two objects are rubbed together, causing electrons to transfer from one object to the other. The object that gains electrons becomes negatively charged, while the object that loses electrons becomes positively charged. To determine the charges of two objects charged via triboelectric charging, we can use the triboelectric series. The triboelectric series is a list of materials ranked according to their tendency to gain or lose electrons. Materials higher on the series tend to lose electrons (become positively charged) when rubbed against materials lower on the series, which tend to gain electrons (become negatively charged). For example, if we rub glass (higher on the triboelectric series) against silk (lower on the series), glass will lose electrons and become positively charged, while silk will gain electrons and become negatively charged. Another way is to use a known - charged object (e.g., a positively charged glass rod) and observe the interaction (attraction or repulsion) with the triboelectrically - charged objects. Repulsion indicates the same charge, and attraction indicates the opposite charge.

Answer:

To tell the charges of two triboelectrically - charged objects:

1. Use the triboelectric series: Compare the two materials. The material higher on the series is positively charged (lost electrons), and the lower one is negatively charged (gained electrons).
2. Use a known - charged object: Observe if the triboelectrically - charged objects are attracted or repelled by a known - charged object (e.g., a positively charged glass rod). Repulsion means the same charge as the known object, and attraction means the opposite charge.