Closed Circuit

A closed circuit is one in which the pathway of the electrical current is complete and unbroken.


Open Circuit

An open circuit is one in which the pathway of the electrical current is broken. 


Parallel Circuit

A parallel circuit has multiple pathways for the current to flow. If the circuit is broken the current may pass through other pathways and other devices will continue to work.


Series Circuit

A series circuit is one which provides a single pathway for the current to flow. If the circuit breaks, all devices using the circuit will fail