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Physics GCSE > Electricity Symbols And Graphs (10) > Flashcards

Electricity Symbols And Graphs (10) Flashcards

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1
Q

Voltage-current graph for a metal filament lamp

A

As the temperature of the metal filament increases, the resistance increases, hence the curve

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2
Q

Voltage-current graph for a diode

A

Current will only flow through a diode in one direction, as shown

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3
Q

Voltage-current graph for a wire

A

The current through a wire (at constant temperature) is proportional to voltage

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4
Q

Voltage-current graph for a resistor

A

The current through a resistor (at constant temperature) is proportional to voltage-current is proportional to voltage. DIfferent resitors however, have different resistance, therefore slopes may have different gradients to this. However they will always be straight

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5
Q
A

Cell

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6
Q
A

Battery

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7
Q
A

Switch open

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8
Q
A

Switch closed

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9
Q
A

Diode

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10
Q
A

Variable resistor

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11
Q
A

LDR

Light Dependant Resistor

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12
Q
A

Thermistor

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13
Q
A

Fuse

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14
Q
A

Lamp

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15
Q
A

Ammeter

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16
Q
A

Voltmeter

17
Q
A

Fixed resistor

18
Q
A

LED

Light Emitting Diode

19
Q
A

Relay

20
Q
A

Loudspeaker

21
Q
A

Microphone

22
Q
A

Earth/Ground

23
Q
A

Electric bell

24
Q
A

Transformer

25
Q
A

Motor

26
Q
A

Generator

27
Q
A

Heater

28
Q

What do light emitting diodes do

A

Emit light when a current flows through them in a forward direction.

29
Q

Uses of light emitting diodes

A

Digital clocks

Traffic lights

Digital clocks

30
Q

Unlike a light bulb, LED’s don’t have a ___________ that can burn out

A

Filament

31
Q

What does an LDR do

A

Changes resistance depending on how much light falls on it

32
Q

In _________ light, the resistance of an LDR falls, and in ______________, the resistance is ____________

A

Bright

Darkness

Highest

33
Q

Where is an LDR useful

A

Burglar detectors

34
Q

A thermistor is a _______________-dependant resistor

A

Temperature

35
Q

In hot conditions, the resistance of a thermistor goes _________ and in cool conditions, the resistance goes _______

A

Down

Up

Physics GCSE (22 decks)

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