Physics - static electricity - lesson 3

What is the unit for electric charge?

• Newton [N]

• Coulomb [C]

• Ampére [A]

Which elementary particle is not bound to the nucleus?

• Proton

• Neutron

• Electron

What elementary particle has no charge?

• Neutron

• Electron

• Proton

The elementary charge of an electron is -1.602176364 X 10^-19 C. What is the charge of a proton?

• A proton has the same charge as an electric but with a (+) sign.

• A proton has a the same charge as an electron.

• A proton obviously cannot have the same charge as an electron.

• Protons do not have a charge only electrons do.

Electric force is a __________.

• contact force

• non-contact force

• both a contact and non-contact force

What type of interaction will a charged object have with a neutral object?

• No interaction

• repulsive

• attractive

What is the only way that two objects can repel each other?

• If they are oppositely charged

• If they have the same shape

• If they are both charged with the same type of charge

Conductors permit _________ to flow freely from particle to particle. (multiple choice)

• charges

• electrons

• protons

• neutrons

__________ impede the flow of free electrons from atom to atom and molecule to molecule.

• Insulators

• Charges

• Impedance

• Conductors

Are metals conductors?

• Yes

• No

• Only a few