Electricity
voltmeter
what device measures voltage?
ammeter
what device measures current?
resistor
what is used to modify resistance?
north and south
what poles does a magnet have?
blue
what is the color of the neutral wire?
switch
what can turn on/off the light?
green-yellow
what is the color of the grounding wire?
volt
what is the unit of voltage?
light bulb
what emits both heat and light?
microphone
what can record sound?
wire
what does electricity flow through?
fuse
what is used to secure an electric circuit?
speaker / electric bell
what can emit sound?
copper
what material is most commonly used for making wires?
to close an electric circuit
what is the neutral wire used for?
normally opened / normally closed
what 2 kinds of switches are there?
battery
what can hold electricity inside of it?
diode
what allows current to flow only from one side?
transformer
what can increase voltage?
motor
what converts electrical energy into mechanical energy by rotating?
magnetic field
what is needed for a motor to rotate?
electrodynamic force
what force is used to rotate most of the motors?
dc voltage
what kind of voltage keeps a constant value?
I = U / R
what is Ohm's law?
ac voltage
what kind of voltage constantly changes its value?