Power/Energy Flashcards
1
Q
Thermistor
A
A component where resistance changes with its temperature
2
Q
Where is a thermistor used ?
A
In temperature sensors e.g fire alarms
3
Q
Direct current
A
Electricity made in batteries, one direction current
4
Q
Alternating current
A
Electricity from the mains, current moves back and forth
5
Q
electrical resistance
A
a measure of how much material tries to stop electric current passing through it
6
Q
LDR
A
light dependent resistor
7
Q
what LDRs respond to
A
light changes
8
Q
where can LDRs be used?
A
in street lamps
9
Q
LED
A
light emitting diode
10
Q
what is power?
A
the rate of energy transfer per second
11
Q
what are the units of power?
A
watts
12
Q
A
