Gives energy to the electrons in the circuit.

Pushes electrons thru the wires.

Low resistance paths for electrons to flow.

Restrict the flow of current.

Use up voltage and make heat.

Makes radiant energy and uses voltage.

Can make a break in a circuit to turn the electricity on or off.

Can change the resistance as desired.

Temporary storage of voltage.

A one-way switch, allowing electricity to flow only one way.

Will melt when too much current flows thru it. Cannot be reset.

Will trip or turn off when too much current flows thru it. It can be reset.

Protects circuits against too much current.

Device A

Device B

Device D

Device E

Like a water pump.

Like water pipes.

Like a restriction in a water pipe.

Like a water wheel (does something useful in a circuit).

Like a water faucet.