voltage source, load, and conductors

voltage source, load, and overcurrent device

ammeter, load, and voltage source

resistor, conductors, and load

current

emf

joule

coulomb

Copper

Porcelain

Silver

Gold

the difference between voltage and current

the potential difference between two points

units of work

the rate of current flow

$$12\Omega\ \pm 10\%$$

$$10\Omega\ \pm 10\%$$

$$12\Omega\ \pm 5\%$$

$$10\Omega\ \pm 5\%$$

amperes

volts

watts

joules

proportional to the smallest resistance

less than the smallest resistance

greater than the smallest resistance

equal to the smallest resistance

volt-amperes

coulombs

amperes

ohms

ammeter

voltmeter

ohmmeter

wattmeter

divide voltage by resistance (E/R)

multiply voltage by resistance (E × R)

divide resistance by power (R/P)

multiply power by resistance (P × R)

power

current

resistance

voltage

$$600\text{W}$$

$$120\text{W}$$

$$5\text{W}$$

$$240\text{W}$$

power

voltage

emf

resistance

$$480\text{V}/600\text{V}$$

$$120\text{V}/240\text{V}$$

$$360\text{V}/480\text{V}$$

$$208\text{V}/230\text{V}$$