Terminologies

• Current - a flow of electric charge. (ampere, A)

• Voltage - Voltage is the potential energy that makes the electrical current flow in a circuit by pushing the electrons around. (volt, V)

• Resistance - the hindrance to the flow of charge. (ohm, Ω)

• Loop -    any closed path in a circuit.

• Node -   a point where two or more circuit element connect.

• Branch - a portion of the circuit that consists of one circuit element and its two terminal nodes.