Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

PHYSICS > P4 > Flashcards

P4 Flashcards

You may prefer our related Brainscape-certified flashcards:
Physics 101 flashcards AP® Physics flashcards
1
Q

IF AN ATOM HAS NO CHARGE…

A

It has equal numbers of protons and electrons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

IF AN ATOM HAS A POSITIVE CHARGE…

A

Loss of electrons more protons then electrons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

IF ATOM HAS A NEGATIVE CHARGE….

A

Gain of electrons more electrons than protons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

WHAT IS STATIC ELECTRICITY?

A

Build up of charge on insulating materials

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

HOW DOES STATIC ELECTRICITY HAPPEN?

A

When you rub two insulating materials together electrons are rubbed off one and passed onto the other

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

HOW DO WE KNOW WHICH WAY ELECTRONS ARE TRANSFERRED?

A

We dont it depends on properties of the materials

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

WHAT WAY DO FIELD LINES GO OUT ON POSITIVE CHARGED?

A

Outwards

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

WHAT WAY DO FIELD LINES GO ON NEGATIVE CHARGED?

A

Inwards

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

WHAT IS THE THREE RULES FOR OBJECTS WITH FIELD LINES

A
  • They are non contact force so field and force between gets weaker as you get further away
    -Opposites attract so positive attracts a negative
    -Force inbetween is called electrostatic attraction
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

WHAT IS CURRENT MEASURED BY?

A

An ammeter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

DEFINE CURRENT?

A

A measure of flow of electrons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

WHICH WAY DOES CURRENT FLOW?

A

From positive terminal of battery to negative terminal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

WHAT IS CURRENT MEASURE IN?

A

Amperes (A)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

WHAT IS THE EQUATION FOR CURRENT?

A

I= Q / t
Current= charge flow / time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

WHAT IS POTENTIAL DIFFERENC MEASURED WITH?

A

A voltmeter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

DEFINE POTENTIAL DIFFERENCE?

A

Force driving the flow of electrons
( provided by cell or battery )

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

WHAT IS POTENTIAL DIFFERENCE MEASURED IN?

A

Volts ( V )

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

WHAT IS THEEQUATION FOR POTENTIAL DIFFERENCE?

A

V= I x R
P.D = Current x Resistence

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

WHAT IS RESISTENCE?

A

Everything that resists the flow of electrons

20
Q

WHAT IS RESISTENCE MEASURED IN?

A

Ohms

21
Q

WHAT IS THE EQUATION FOR RESISTENCE?

A

R = I / V
Resistance = Current / P.D

22
Q

WHAT IS CHARGE?

A

A measure of total current that flows with in a certain period of time

23
Q

WHAT IS CHARGE MEASURED IN?

A

Coulombs ( Q )

24
Q

WHAT IS THE EQUATION FOR CHARGE FLOW?

A

Q = I x t

charge flow = Current x time

25
Q

WHAT IS THE JOB OF A CELL?

A

pushes electrons around the circuit

26
Q

WHAT IS THE JOB OF A SWITCH?

A

Enables current in circuit to be switched on and off

27
Q

WHAT IS JOB OF FILAMENT LAMP?

A

emits light when current runs through it

28
Q

WHAT IS THE JOB OF AN AMMETER?

A

To measure electrons current

29
Q

WHAT IS THE JOB OF A VOLTMETER?

A

to measure potential difference

30
Q

WHAT IS JOB OF A FIXED RESISTOR

A

limits current in circuit

31
Q

WHAT IS JOB OF A VARIABLE RESISTOR?

A

allows current to be varied

32
Q

WHAT IS JOB OF A FUSE?

A

If current gets to high it is designed to melt and break circuit

33
Q

WHAT IS JOB OF A DIODE?

A

Only allows current to flow in one direction

34
Q

WHAT IS JOB OF A LDR?

A

Changes resistance due to intensity of light

35
Q

WHAT IS JOB OF THERMISTOR

A

Limits current in circuit based off temperature

35
Q

WHAT IS JOB OF A LED?

A

Emits light when current passes through it one way

36
Q

HOW MANY LOOPS DOES A SERIES CIRCUIT HAVE?

A

one loop

37
Q

IN A SERIES CIRCUIT HOW ARE THE COMPONENTS CONNECTED?

A

one after another

38
Q

IN A SERIES CIRCUIT HOW IS CURRENT SHARED?

A

It is same in every point of the circuit so ammeter can be placed anywhere

39
Q

IN A SERIES CIRCUIT HOW IS POTENTIAL DIFFERENCE SHARED?

A

P.D of battery is shared across all components
- IF SAME COMPONENT SAME VOLTAGE
- total= V1+V2+V3

40
Q

IN A SERIES CIRCUIT HOW DOES RESISTENCE WORK?

A

Total resistance is sum of resistance of all components

41
Q

HOW MANY LOOPS DOES A PARALLEL CIRCUIT HAVE?

A

more than one

42
Q

IF A LOOP HAS A GREATER RESISTANCE IN PARALLEL…

A

it will take less share of current

43
Q

IN A PARALLEL CIRCUIT HOW IS CURRENT SHARED?

A

Across loops in anyway

44
Q

HOW IS POTENTIAL DIFFERENCE SHARED IN A PARALLEL CIRCUIT?

A

every component gets full source of P.D

45
Q

HOW DOES RESISTENCE WORK IN A PARALLEL CIRCUIT

A

more components added in parallel resistance lowers

46
Q

WHY IS CURRENT SHARED ACROSS BRANCES IN A PARALLEL CIRCUIT

A

because different junctions so different amount of charge can flow through different components

PHYSICS (14 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions