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IGCSE Physics (PAS 2017) > Circuit Symbols > Flashcards

Flashcards in Circuit Symbols Deck (27)
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1

diode

only allows current to pass through in one direction

 

2

variable resistor

a resistor whose resistance can be varied, increasing the resistance decreases the current

3

AC supply

alternating current, current flows one way, then the other

4

push switch (open)

no current flows until push switch is pushed

has never been spotted in a paper

5

milliammeter

(a sensitive ammeter, which measures in milliamps)

6

relay​

an electromagnetic switch

has never been spotted in a paper​

7

microphone

converts sound energy to electrical energy

has never been spotted in a paper​

8

thermistor

resistance changes with temperature, cold = high resistance, can be used as a temperature sensor

9

cell

converts chemical energy to electrical energy

10

resistor

reduces the current flowing

11

light emitting diode (LED)

a diode that emits light, only allows current to pass through in one direction

12

push switch (closed)

switch is pushed, current can flow

has never been spotted in a paper​

13

lamp

converts electrical energy to light (and heat too)

14

electric bell

ding ding

has never been spotted in a paper​

15

fuse

safety device, thin wire melts when current is too high, breaks circuit

16

motor

converts electrical energy to kinetic energy

17

closed switch

current can flow, circuit is complete

18

battery

two or more cells connected

19

transformer

can increase or decrease AC voltage/current

often labelled when seen in a paper

20

heater

heats things, converts electrical energy to thermal energy

has never been spotted in a paper​

21

light dependent resistor (LDR)

resistance changes with light intensity, dark = high resistance, can be used as a light sensor

22

open switch​

current can't flow, circuit is broken

23

generator

converts kinetic energy to electrical energy

has never been spotted in a paper

24

ammeter

measures current, placed in series

25

DC supply

direct current, current flows from positive to negative

26

voltmeter​

measures voltage, placed in parallel across the component to be measured

27

Earth

safety feature, allows charge to flow away safely

has never been spotted in a paper