Electric Charges and Electric Forces

Front

What type of charge does a substance have if it has an excess number of electrons on its surface?

Back

A negative charge.

Front

What happens when a negatively charged balloon is brought near a positively charged glass rod?

Back

The balloon will be attracted to the rod.

Front

True or False: An object that is positively charged contains more protons than electrons.

Back

True.

Front

What are metals such as copper, iron, gold, and silver classified as?

Back

Conductors.

Front

Electric charges that are different _______ each other.

Back

Attract.

Front

What type of charge does an object have if it has more electrons than protons?

Back

A negative charge.

Front

What type of charge does an object have if it has more protons than electrons?

Back

A positive charge.

Front

What is the term for materials that do not allow electric charges to flow easily?

Back

Insulators.

Front

What is the force called that occurs between two charged objects?

Back

Electric force.

Front

What happens to two like charges (e.g., two positive charges) when they are brought close together?

Back

They repel each other.