10 Direct-Current Circuits

energy produced per unit charge, drawn from a source that produces an electrical current

• electromotive force (emf)
• equivalent resistance
• internal resistance
• three-wire system

resistance of a combination of resistors; it can be thought of as the resistance of a single resistor that can replace a combination of resistors in a series and/or parallel circuit

• electromotive force (emf)
• equivalent resistance
• internal resistance
• three-wire system

amount of resistance to the flow of current within the voltage source

• electromotive force (emf)
• equivalent resistance
• internal resistance
• three-wire system

sum of all currents entering a junction must equal the sum of all currents leaving the junction

• Kirchhoff’s rules
• loop rule
• Ohm rule
• junction rule

set of two rules governing current and changes in potential in an electric circuit

• Kirchhoff’s rules
• loop rule
• Ohm rule
• junction rule

algebraic sum of changes in potential around any closed circuit path (loop) must be zero

• Kirchhoff’s rules
• loop rule
• Ohm rule
• junction rule

difference in electric potential between two points in an electric circuit, measured in volts

• electromotive force (emf)
• potential resistance
• potential difference
• potential drop

loss of electric potential energy as a current travels across a resistor, wire, or other component

• electromotive force (emf)
• potential resistance
• potential difference
• potential drop

circuit that contains both a resistor and a capacitor

• RC circuit
• DC Ciruit
• terminal voltage
• thermal hazard

hazard in which an electric current passes through a person

• three-wire system
• shock hazard
• terminal voltage
• thermal hazard