Electricity Basics
These particles make up the nucleus of an atom
Protons and neutrons
This makes water conductive to electricity
Ions
V=IR
A circuit has a resistance of 24 Ω and is connected to a 120 V power supply. What is the current flowing through the circuit?
5 A
Magnets always have these two poles
North and south
Certain animals use magnetism to do this
Migrate long distances
This subatomic particle is negatively charged
Electron
This builds electric charge through chemical reactions
Battery
V=IR
A light bulb draws 2.5 A of current when connected to a household outlet of 120 V. What is the resistance of the bulb?
48 Ω
This is the area over which a magnet exerts its force.
Magnetic field
Magnetic fields are caused by this
Moving electric charges
This material easily moves electrons
Conductor
To prevent yourself from getting shocked, it is important to do this to your appliances
Ground
P=VI
A toaster is connected to a 120 V outlet and draws 9 A of current. What is the power consumed by the toaster?
1080 W
If you cut a magnet, each piece will have this
Both poles
The movement of ions within the earth cause this
Earth's magnetic field
A circuit must be this to allow for electricity to flow
Closed
Lightning is formed when this charge builds up at the bottom of a cloud
Negative
P=VI
A standard hair dryer is plugged into a 12 V outlet and consumes 144 W of power on its high-heat setting. What is its current?
12 A
Name a material that is always magnetic
Iron, nickel, cobalt
Compasses point toward this
Magnetic north
The transfer of electrons causes this
Static electricity
Without one of these, your circuit will short circuit
Resistor, circuit breaker, fuse
V=IR P=VI
An electric kettle is rated at 2,400 W and operates on a 120 V household supply. Calculate the resistance of kettle.
6 Ω
Wires with electricity moving through them create this.
Magnetic field
Moving a magnet near a closed circuit causes this to happen
Electricity to move