Understanding Static Electricity

* Triboelectric Effect: When certain materials are rubbed together, electrons (negatively charged particles) can transfer from one material to the other. This transfer creates an imbalance of charge, leading to static electricity.

* The Triboelectric Series: Materials are ranked by their tendency to gain or lose electrons. Materials higher on the series tend to lose electrons and become positively charged, while those lower on the series tend to gain electrons and become negatively charged.

In this scenario:

* Glass is higher on the triboelectric series than felt. This means glass has a stronger tendency to lose electrons.

* When rubbed, electrons transfer from the glass to the felt. This leaves the glass with a deficiency of electrons, making it positively charged.

True Statements:

1. The felt becomes negatively charged. Since electrons are transferred from the glass to the felt, the felt gains electrons and becomes negatively charged.

2. The glass lost electrons. This is the fundamental reason the glass becomes positively charged.

Incorrect Statements:

1. The glass gained electrons. This is incorrect. Glass loses electrons.

2. The felt lost electrons. This is incorrect. Felt gains electrons.

Key Takeaway: When you rub two materials together, one will become positively charged (electron deficiency) and the other negatively charged (electron surplus). The triboelectric series helps predict which material will gain or lose electrons.