Components

What does a switch do

Control flow of electricity, open = no flow, closed = flow

What does a fuse do

break if too much current flows through

What does an LED do

emits light when current flows through forward direction, only allows current to flow in one direction

What do ammeters measure, where are they placed

current, connected in series

What do voltmeters measure, where are they placed

potential difference, connected in parallel

What does a variable resistor do

Easily modify amount of resistance provided

What happens in LDR

As light increases, resistance decreases

Examples of LDR

Automatic night lights, burglar alarms

What happens in thermistor

As temperature increases, resistance decreases

Example of thermistor

car engines, electronic thermostat