Circuits

studied byStudied by 19 people
4.0(1)
Get a hint
Hint
<p>What does this symbolise?</p>

What does this symbolise?

1 / 60

flashcard set

Earn XP

61 Terms

1
<p>What does this symbolise?</p>

What does this symbolise?

Cell

New cards
2
<p>What does this symbolise?</p>

What does this symbolise?

Battery

New cards
3
<p>What does this symbolise?</p>

What does this symbolise?

Open switch

New cards
4
<p>What does this symbolise?</p>

What does this symbolise?

Closed switch

New cards
5
<p>What does this symbolise?</p>

What does this symbolise?

Bulb/lamp

New cards
6
<p>What does this symbolise?</p>

What does this symbolise?

Fuse

New cards
7
<p>What does this symbolise?</p>

What does this symbolise?

LED

New cards
8
<p>What does this symbolise?</p>

What does this symbolise?

DC power supply

New cards
9
<p>What does this symbolise?</p>

What does this symbolise?

AC power supply

New cards
10
<p>What does this symbolise?</p>

What does this symbolise?

Resistor

New cards
11
<p>What does this symbolise?</p>

What does this symbolise?

Variable resistor

New cards
12
<p>What does this symbolise?</p>

What does this symbolise?

Ammeter

New cards
13
<p>What does this symbolise?</p>

What does this symbolise?

Voltmeter

New cards
14
<p>What does this symbolise?</p>

What does this symbolise?

Diode

New cards
15
<p>What does this symbolise?</p>

What does this symbolise?

LDR

New cards
16
<p>What does this symbolise?</p>

What does this symbolise?

Thermistor

New cards
17
<p>What does this symbolise?</p>

What does this symbolise?

Motor

New cards
18

What is current?

Flow of electrical charge

New cards
19

What is current measured in?

Amperes

New cards
20

What is potential difference?

Driving force that pushes the charge

New cards
21

What unit is potential difference measured in?

Voltage

New cards
22

What is resistance?

Anything that slows the current down

New cards
23

What is resistance measured in?

Ohms

New cards
24

In metals, what is current caused by?

Flow of electrons

New cards
25

What is charge measured in?

Coulombs

New cards
26

What is the symbol for amperes?

I

New cards
27

What is energy measured in?

Joules

New cards
28

What is the symbol for voltage?

V

New cards
29

What happens to resistance (usually) when temperature increases?

Increases

New cards
30

When resistance increases, what happens to current?

Decreases

New cards
31

How does resistance work?

Current has to do work against it and therefore slows down

New cards
32

What does the work done against resistance cause?

Transfer of energy of which some is useful and some is dissapated

New cards
33

When a current flows through a resistor, what happens to its temperature?

Heats up

New cards
34

Why does the resistor heat up when current flows through it?

Electrons collide with the ions and then the ions gain energy, vibrate, heat up, and makes it harder for the electrons to get through the resistor

New cards
35

What happens to the resistance of a thermistor as temperature increases?

Decreases

New cards
36
<p>What kind of graph is this?</p>

What kind of graph is this?

Resistor

New cards
37
<p>What kind of graph is this?</p>

What kind of graph is this?

Filament lamp

New cards
38
<p>What kind of graph is this?</p>

What kind of graph is this?

Diode

New cards
39
<p>What kind of graph is this?</p>

What kind of graph is this?

LDR

New cards
40
<p>What kind of graph is this?</p>

What kind of graph is this?

Thermistor

New cards
41

What does LDR depend on?

Light

New cards
42

What happens to LDR resistance in bright light?

Low

New cards
43

What happens to LDR resistance in darkness?

High

New cards
44

What are LDR’s used for?

  • Automatic night lights

  • Outdoor lighting

  • Burglar detectors

New cards
45

What is thermistor dependent on?

Temperature

New cards
46

What happens to thermistor resistance if the temperature is cool?

High

New cards
47

What happens to thermistor resistance if the temperature is hot?

Low

New cards
48

What are thermistors used for?

  • Thermostats

  • Car engine temperature sensors

New cards
49

What is a series ciruit?

Current flows through one pathway

New cards
50

What is a parallel circuit?

Current flows through more than one pathway

New cards
51

What happens to a series circuit if you remove one component?

It will stop working

New cards
52

What happens to a parallel circuit if you remove one component?

Won’t affect the others at all

New cards
53

How are voltmeters always connect to a circuit - no matter what?

Parallel

New cards
54

What happens to current in a parallel circuit?

It is distributed across components

New cards
55

What happens in a junction of a parallel circuit?

Current splits or rejoins

New cards
56

Does the total current entering a junction equal total current leaving?

Yes

New cards
57

What happens in a series circuit when a resistor is added?

Total resistance increases

New cards
58

What happens in a parallel circuit when a resistor is added?

Total resistance decreases

New cards
59

The larger the current the ____ energy transferred:

a. More

b. Less

More

New cards
60

What happens to efficiency usually when a component is heated?

Reduced

New cards
61

Can components in a circuit melt?

Yes

New cards

Explore top notes

note Note
studied byStudied by 5 people
... ago
5.0(1)
note Note
studied byStudied by 191 people
... ago
5.0(2)
note Note
studied byStudied by 20 people
... ago
5.0(1)
note Note
studied byStudied by 11 people
... ago
5.0(1)
note Note
studied byStudied by 50 people
... ago
5.0(1)
note Note
studied byStudied by 15 people
... ago
4.0(1)
note Note
studied byStudied by 123892 people
... ago
4.9(601)

Explore top flashcards

flashcards Flashcard (23)
studied byStudied by 1 person
... ago
5.0(1)
flashcards Flashcard (67)
studied byStudied by 38 people
... ago
5.0(2)
flashcards Flashcard (46)
studied byStudied by 417 people
... ago
5.0(3)
flashcards Flashcard (67)
studied byStudied by 15 people
... ago
4.5(2)
flashcards Flashcard (25)
studied byStudied by 12 people
... ago
5.0(1)
flashcards Flashcard (26)
studied byStudied by 25 people
... ago
5.0(1)
flashcards Flashcard (58)
studied byStudied by 51 people
... ago
5.0(1)
flashcards Flashcard (55)
studied byStudied by 17 people
... ago
5.0(1)
robot