Electric Charges and the Charging Process

How does friction cause static electricity?

• Friction heats the materials, thus causing electricity.

• Rubbing causes the protons to be stripped from the object.

• Rubbing materials together displace atoms, causing sparks to fly.

• Rubbing materials together can strip electrons off atoms, causing one material to become positively charged and the other to become negatively charged.

A balloon has a negative net charge. What answer best describes what happens when you touch it?

• Electrons from the balloon move into your body.

• Protons from the balloon move into your body.

• Electrons from your body move onto the balloon.

• Protons from your body move onto the balloon.

What particles in an atom have an electric charge?

• electrons and neutrons

• protons and electrons

• neutrons and protons

• protons and nucleus

An atom becomes a negative ion when _______.

• an electron joins the atom

• an electron leaves the atom

• a proton joins the atom

• a proton leaves the atom

A positively charged iron rod is brought close without touching a neutral sphere of aluminum. The aluminum sphere is grounded with wire. When the wire is removed, the aluminum sphere will become _______.

• positive

• negative

• remain unchanged

• it cannot be determined.

Induction occurs due to ________.

• movement of electron

• leakage of charge

• ionization of atoms

• uniform charge distribution

You rub a balloon on your hair. The balloon becomes negatively charged, therefore, your hair ________.

• lost protons

• gained neutrons

• gained atoms

• lost electrons

An electrically neutral object has _________.

• no electrons

• more protons than electrons

• about equal numbers of protons and electrons

• more electrons than protons

An object becomes electrically charged when ___________.

• electrons from it are destroyed

• electrons are transferred to it

• electrons are created in it

• protons are created in it

What are the two types of electric charge?

• electrons and positrons

• positive and negative

• electrons and protons

• net and fundamental