Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Physics > Electricity Booklet > Flashcards

Electricity Booklet Flashcards

1
Q

What is electricity

A

A form of energy that is supplied by an electrical source

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

What must occur for atoms to form ions

A

The atom must lose or gain electrons

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

What do like charges do

A

Repel

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

What do unlike charges do

A

Attract

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

What is the relationship between charged and uncharged objects

A

Charged objects attract uncharted objects

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

What are the two types of circuit

A

+series

+parallel

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

What is a series circuit

A

A circuit in which all the components are connected one after the other (in a series).

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

What is a parallel circuit

A

A circuit which has more than one interconnected branches, in which each branch is independant.

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

What is electrical current

A

The rate of flow of charge in a circuit

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is current measured with and what is its equation

A

I= Q/T

it is measured with an ammeter
Measured in amperes

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

What is potential difference (voltage)

A

The amount of energy given to each coulomb of charge in a circuit

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

What is potential difference measured in and with and what is its equation

A

V= E/Q

it is measured with a voltmeter
Measured in volts

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

What is resistance

A

The opposition to the flow of charge in a circuit

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

What is the component of resistance

A

A resistor

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

What factors affect the resistance of a resistor

A

+ material of resistor
+ surrounding temperature
+ thickness of resistor
+ length of resistor

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

What is resistance measured in

A

Ohms

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

What is ohms law

A

V= IR or R= V/I

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

In a series circuit: does current add together or remain constant

A

Remain constant

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

In a series circuit: does voltage add together or remain constant

A

Add together

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

In a series circuit: does resistance add together or remain constant

A

Add together

21
Q

In a parallel circuit: does current add together or remain constant

A

Add together

22
Q

In a parallel circuit: does voltage add together or remain constant

A

Remain constant

23
Q

In a parallel circuit: does resistance add together or remain constant

A

Different rule: 1/Rt= 1/R1 + 1/R2…

24
Q

In a parallel circuit which branch receives the highest share of current

A

The branch with the lowest resistance

25
In a series circuit which component receives the highest share of voltage
The component with the highest share of voltage
26
What is power
The measure of how much energy is transferred in a circuit per second
27
What is power measured in and what is its equation
P= E/T Watts
28
Why can the formula of power change
As they value depends on the original values that are given
29
What are the other equations of power
+ P= I(squared) x R (resistance and current given) + P= V(squared)/ R (resistance and voltage given) + P= IV (current and voltage given)
30
What are the two types of current in circuit
- alternating | - direct
31
What is a direct current
One which always flows in one direction - represented by a line on one side of the oscilloscope.
32
What is an alternating current
One which constantly flows in changing directions - represented by a line on both sides of the oscilloscope
33
What is the mains voltage of the UK
230 V
34
What is the mains frequency of the UK
50 Hz
35
What is a potential divider
Two components (usually resistors) connected in series.
36
How can you find the voltage of one of the resistors
V2= (r2/r1+r2) x Vs
37
In a potential divider, what happens to the voltage
It is split between the two components, proportional to the size of the resistance of each component.
38
What is the equation of the voltage being split in a potential divider
v1/v2 = r1/r2
39
What is an LDR
A light dependant resistor
40
What does an LDR do in light exposure increases
It’s resistance decreases
41
What is a thermistor
A temperature dependant resistor
42
What occurs as the temperature of a thermistor increases
The resistance decreases
43
What is the role of a protection resistor
A resistor which placed next to fragile components to prevent them from overheating or becoming damaged
44
What is the role of a fuse
To shut down the circuit if the current becomes too high or to prevent components from becoming damaged
45
What is a transistor
An electronic switch which consists of more than one component
46
What are the two types of transistor
+ NPN | + MOSFET
47
What must the voltage be for an NPN transistor to close its switch
0.7 V
48
What must the voltage be for a MOSFET transistor to close its switch
2 V
49
What is the rating of a fuse
The current

Physics (7 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions