t urn a circuit on (closed) and off
(open) switch
n electrical current heats the
A
the filament in a bulb so that it gives ELEC
out light lamp
r estricts or limits the flow of ELECTRICAL
electrical current fixed resistor
CIRCUITS
eg for volume command variable resistor
COMPONENTS
thermistor
A
can be used in thermostats or heat
activated fire alarms. therminstor
depends on light intensity
light-dependent resistor (LDR)
e.g. security cameras
llows current to flow in one
a
direction only
semiconductor diode
to convert alternating current into direct current
(open) switch
n electrical current heats the
A
the filament in a bulb so that it gives ELEC
out light lamp
r estricts or limits the flow of ELECTRICAL
electrical current fixed resistor
CIRCUITS
eg for volume command variable resistor
COMPONENTS
thermistor
A
can be used in thermostats or heat
activated fire alarms. therminstor
depends on light intensity
light-dependent resistor (LDR)
e.g. security cameras
llows current to flow in one
a
direction only
semiconductor diode
to convert alternating current into direct current
