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IGCSE Physics > Electric Circuit Symbols > Flashcards

Electric Circuit Symbols Flashcards

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1
Q
A

Cell

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2
Q
A

Battery of cells

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3
Q
A

Battery

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4
Q
A

Power supply

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5
Q

Describe a power supply

A

It is permanent, not temporary and is not a battery. It provides current by plugging something into it. It relies on an electricity source

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6
Q
A

D.c power supply
Doesn’t run out and follows conventional current flow.

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7
Q

Describe the flow of current from a d.c power source

A

Like a battery it only supplies direct current in 1 direction.
Conventional current flow

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8
Q
A

A.c power supply

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9
Q
A

Fixed resistor
Slows current down

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10
Q

Name, ability and example

A

Variable resistor
Has the ability to change resistance such as a dimmer switch or hairdryer

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11
Q

Name, purpose, example

A

Thermistor
Reacts to temperature
Can change resistance according to temperature
Eg. Infrared security camera that sees change in temperature

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12
Q

Name, example, purpose

A

Light-dependent resistor/photo resistor
Light-controlled variable resistor. The darker it is the higher the resistance
The brighter it is the lower the resistance
NEEDS TO BE IN A CIRCUIT WITH A TRANSISTOR
Day/night switch
LDR

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13
Q
A

Heater
(Won’t see in circuit)

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14
Q
A

Potential divider

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15
Q
A

Transformer

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16
Q
A

Magnetising coil

17
Q
A

Parallel cells

18
Q
A

Switch

19
Q

Name and purpose

A

Earth/ground
Way to dissipate charge
(Bury it)

20
Q
A

Junction of conductors
Wires coming together

21
Q
A

Lamp
ALSO ACTS AS RESISTOR

22
Q
A

Lamp
ALSO ACTS AS RESISTOR

23
Q
A

Motor

24
Q
A

Generator

25
Q
A

Ammeter
ONLY CONNECTED IN SERIES

26
Q

Are ammeters connected in parallel or series and why

A

Series as they have a low resistance

27
Q

What does a voltmeter do and do we connect it in parallel or series

A

It measures the e.m.f in volts (how much energy we are supplying to the circuit)
Parallel as it has a very high resistance and it does not alter the flow of current

28
Q
A

Diode

29
Q

What does a diode do +Eg. In real life

A

It changes AC current to DC
Electronic devices like current going in 1 direction, so there is a diode in your laptop charger

30
Q

Name and purpose

A

LED
Light emitting diode
Changes AC current to DC current and emits light in the process (needs very little current)

31
Q

Name and purpose

A

Fuse
Protection device, trip switch/circuit breaker
Stops current that can cause circuit damage depending on the rating. The wire burns out to stop the connection

32
Q

Name and description

A

Relay coil

made of an electromagnet coil and a magnetic switch

IGCSE Physics (11 decks)

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