Electricidad: objetos cargados

The video tutorial explains how friction can transfer electrons from one object to another, resulting in a negative charge. It illustrates this with an example of a balloon gaining electrons from a person's head. When the negatively charged balloon is brought near a wall, the positive charges in the wall attract the balloon. The video also introduces the electroscope, a device used to detect electrical charges. It consists of a metal rod with a knob and metal sheets inside a glass flask. When charged, the leaves of the electroscope repel each other, indicating the presence of a charge.

What happens to a balloon when it is rubbed against a person's head?

• It becomes positively charged.

• It becomes negatively charged.

• It loses all its charge.

• It remains neutral.

Why does a negatively charged balloon stick to a wall?

• The wall repels the balloon.

• The wall has a positive charge.

• The wall is neutral.

• The wall has a negative charge.

What is the primary function of an electroscope?

• To detect magnetic fields.

• To measure weight.

• To detect electric charge.

• To measure temperature.

What happens to the leaves of an electroscope when it is charged?

• They fall off.

• They move closer together.

• They repel each other.

• They remain unchanged.

What component of the electroscope is touched to transfer charge?

• The metal knob.

• The metal rod.

• The metal leaves.

• The glass flask.