Circuit Symbols Flashcards
![](https://s3.amazonaws.com/brainscape-prod/system/cm/212/401/552/q_image_thumb.png?1493113653)
diode
only allows current to pass through in one direction
![](https://s3.amazonaws.com/brainscape-prod/system/cm/212/401/553/q_image_thumb.png?1493113653)
variable resistor
a resistor whose resistance can be varied, increasing the resistance decreases the current
![](https://s3.amazonaws.com/brainscape-prod/system/cm/212/401/554/q_image_thumb.png?1493113654)
AC supply
alternating current, current flows one way, then the other
![](https://s3.amazonaws.com/brainscape-prod/system/cm/212/401/555/q_image_thumb.png?1493113654)
push switch (open)
no current flows until push switch is pushed
has never been spotted in a paper
![](https://s3.amazonaws.com/brainscape-prod/system/cm/212/401/556/q_image_thumb.png?1493113654)
milliammeter
(a sensitive ammeter, which measures in milliamps)
![](https://s3.amazonaws.com/brainscape-prod/system/cm/212/401/557/q_image_thumb.png?1493113655)
relay
an electromagnetic switch
has never been spotted in a paper
![](https://s3.amazonaws.com/brainscape-prod/system/cm/212/401/558/q_image_thumb.png?1493113655)
microphone
converts sound energy to electrical energy
has never been spotted in a paper
![](https://s3.amazonaws.com/brainscape-prod/system/cm/212/401/559/q_image_thumb.png?1493113655)
thermistor
resistance changes with temperature, cold = high resistance, can be used as a temperature sensor
![](https://s3.amazonaws.com/brainscape-prod/system/cm/212/401/560/q_image_thumb.png?1493113656)
cell
converts chemical energy to electrical energy
![](https://s3.amazonaws.com/brainscape-prod/system/cm/212/401/563/q_image_thumb.png?1493113656)
resistor
reduces the current flowing
![](https://s3.amazonaws.com/brainscape-prod/system/cm/212/401/564/q_image_thumb.png?1493113656)
light emitting diode (LED)
a diode that emits light, only allows current to pass through in one direction
![](https://s3.amazonaws.com/brainscape-prod/system/cm/212/401/565/q_image_thumb.png?1493113657)
push switch (closed)
switch is pushed, current can flow
has never been spotted in a paper
![](https://s3.amazonaws.com/brainscape-prod/system/cm/212/401/566/q_image_thumb.png?1493113657)
lamp
converts electrical energy to light (and heat too)
![](https://s3.amazonaws.com/brainscape-prod/system/cm/212/401/567/q_image_thumb.png?1493113657)
electric bell
ding ding
has never been spotted in a paper
![](https://s3.amazonaws.com/brainscape-prod/system/cm/212/401/568/q_image_thumb.png?1493113658)
fuse
safety device, thin wire melts when current is too high, breaks circuit