Introduction to Electricity

What do all atoms consist of?

• A nucleus which contains neutrons and protons

• A proton which contains atoms and neutrons

• A neutron which contains a nucleus and atoms

Electricity is...

• The movement of protons which break free from the nucleus when an external force is applied

• The movement of neutrons which break free from the nucleus when an external force is applied

• The movement of electrons which break free from the nucleus when an external force is applied

Conductors, semi-conductors and insulators

• conductivity under certain conditions

• Superconductor

• is a poor conductor of electricity

• Conductors

• allow electricity to flow readily

• Insulator

• resists current flow

• Semi-conductor

• exhibits zero electrical resistance

• Dielectric

The following are examples of a good conductor, silver and copper

• True

• False

The following are examples of an insulator, silicon and silver

• True

• False

What are the following materials examples of, silver, bakerlite and rubber?

• Conductors and insulators

• Insulators and semi-conductors

• Semi-conductors and

When there is a difference in pressure between two points in a conductor...

• Voltage will flow

• The resistance will stop

• Current will flow

When there is an increase in resistance in a circuit...

• The current will increase

• The current flow will reduce

Ohm's law states...

• The current flow in a circuit is directly proportional to the voltage applied

• The current flow in a circuit is directly proportional to the resistance applied

• The voltage in a circuit is directly proportional to the wattage of a circuit