# Physics - Electricity

Mind Map by dana-howbridge, updated 10 months ago
379
27
0

### Description

National Five physics electricity unit summarised.

## Resource summary

Physics - Electricity
1 Charge
1.1 When a charge is placed near a charged object, it will experiance a force.
1.2 1C=1As-1
2 Conductors
2.1 Metals, carbon
3 Insulators
3.1 Glass, plastic, wood
4 current is the flow of electrons
4.1 1A= 1Cs-1
5 Voltage is the amount of electrical energy given to electrons by the battery
5.1 1V=1JC-1
6 Resistance is material opposes current
6.1
6.2 V=IR
6.3 The higher the resistance the smaller the current
7 Series circuit
7.1 The current is the same at different positions
7.2 Vs=V1+V2+V3
7.3 Rt=R1+R2+R3
8 Parallel circuit
8.1 I=I1+I2+I3
8.2 The voltage across the resistors is the same
8.3 1/Rt=1/R1+1/R2+1/R3
9 Changes energy into electrical energy
9.1 Microphone
9.1.1
9.2 Thermocouple
9.2.1
9.3 Solar cell
9.3.1
9.4 Thermistor
9.4.1
9.5 LDR
9.5.1
10 Changes electrical energy into different energy
10.1 Loudspeaker
10.1.1
10.2 Motor
10.2.1
10.3 Lamp
10.3.1
10.4 LED
10.4.1
11 A capacitor is a device which can store charge
11.1
12 Transistors
12.1 MOSFET
12.1.1 Turns on at 2V
12.1.2
12.2 NPN
12.2.1 Turns on at 0.7 V
12.2.2
13 Power is the change of energy over time
13.1 Mains supply is 230V
13.2 P=E/T
13.2.1 1W=1J/S
14 AC is current that travels in both directions
14.1 50HZ in Britain
14.1.1 Current changes direction 50 times per second
15 Direct current is when current flows in one direction
16 R1/R2=V1/V2
17 conduction is heat transfer in solids
18 convection- liquids and gases
19 Work done is when energy changes into another form of energy
19.1 Ew=Fxd
20 Pessure is the force an object exerts over an area
20.1 P=F/a
21 P1/T1=P2/T2
22 P1V1=P2V2

### Suggestions

Know the principles of electricity
Electricity
Renewable Energy Sources
Principles of basic electrical circuits
GCSE AQA Physics - Unit 3
AQA Physics P1 Quiz
Using GoConqr to study science
GCSE AQA Physics 1 Energy & Efficiency
Waves
Forces and their effects
Forces and motion