Electricity Basics
This negatively charged part of the atom can move through a conductor.
Electron
This quantity uses the symbol E and is measured in volts.
Voltage
Complete the formula: E = I × ___.
R/Resistance
Complete the formula: P = E × ___.
I/Current
A series circuit has this many current paths.
One
Copper is an example of this type of material because charge moves through it easily.
Conductor
This quantity uses the symbol I and is measured in amperes.
Current
A 24 V source is connected to a 12 Ω load. Find current.
2 Amps
A 24 V load draws 2 A. Find power.
48 Watts
In a series circuit, this electrical quantity is the same everywhere in the circuit.
Current
Every basic circuit needs these four things: a source, this pathway, a load, and a control.
Conductors/Path
This quantity uses the symbol R and is measured in ohms.
Resistance
A circuit has 36 V and draws 3 A. Find resistance.
12 Ω/Ohms
An 18 V cordless tool draws 5 A. Find its power.
90 Watts
R1 = 5 Ω, R2 = 10 Ω, and R3 = 15 Ω are in series. Find RT.
30 Ω/Ohms
When a switch is in this condition, the circuit path is broken and current stops.
Open
This quantity uses the symbol P and is measured in watts.
Power
A load draws 5 A through 8 Ω of resistance. Find voltage.
40 Volts
A 1600 W load operates at 120 V. Find current.
13.33 Amps
ET = 60 V and RT = 30 Ω. Find total current.
2 Amps
These electrons occupy the atom's outermost shell and are most involved in electrical conduction.
Valence electrons
Voltage remains constant while resistance doubles. This happens to current.
It is cut in half
A 12 V circuit has 2,000 Ω resistance. Find current in milliamps.
6 mA/Milliamps
A load draws 10 A through 25.3 Ω. Find its power.
2,530 Watts
R1 = 5 Ω, R2 = 10 Ω, R3 = 15 Ω, and IT = 2 A. Find E1, E2, and E3.
10 Volts, 20 Volts, 30 Volts