# Static Electricity

Aaron Lim 4E (1)

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Static Electricity

## 1. Electric field

### 1.1. Defination

1.1.1. A region in which charged particles experiences an electric force

### 1.2. Determine direction of field

1.2.1. Positive test charge used

1.2.2. Draw field lines represent elec. field

1.2.3. Arrow

1.2.3.1. Direction movement positive test charge

### 1.3. Strength

1.3.1. Nearer

1.3.1.1. stronger

1.3.2. Further

1.3.2.1. Weaker

## 2. Charging an insulator by friction

2.1.1. Rubbing

### 2.2. insulator

2.2.1. Electron are not able to flow within it

### 2.3. how does it work

2.3.1. two objects rub together

2.3.1.1. electron weaker bond from one material transfer to another

### 2.4. Discharging charged insulator

2.4.1. Heating

2.4.2. Humid conditions

## 3. Electric Charges

### 3.1. Atom

3.1.1. Electrically Neutral

3.1.2. contains

3.1.2.1. Neutron

3.1.2.2. Proton (+)

3.1.2.3. Electron (-)

3.1.2.3.1. Gain

3.1.2.3.2. Lose

### 3.2. Charges

3.2.1. Unlike

3.2.1.1. Attracts

3.2.1.2. Example

3.2.1.2.1. Positive-Negative

3.2.2. Like

3.2.2.1. Repels

3.2.2.2. Example

3.2.2.2.1. Positive-Positive

3.2.2.2.2. Negative-negative

3.2.3. Measured in

3.2.3.1. Coulombs

3.2.3.1.1. Positive charge

3.2.3.1.2. Negative charge

## 4. Charging conductor by Induction

### 4.2. Conductor

4.2.1. Electron free to move about within it

4.2.2. Metals

4.2.3. Connected to ground wire

4.2.3.1. allow electron to move up down from the conductor

## 5. Applications

### 5.3. Potential hazards

5.3.1. Lightning

5.3.2. Fires and Explosions

5.3.2.1. Pumping of oil into aircraft

5.3.2.2. Truck carrying flammable substance