# ELECTRICITY

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ELECTRICITY

## 1. Electric Charge

### 1.1. Unit

1.1.1. Coulumb (C)

### 1.2. Neutron

1.2.1. Has a neutral charge

1.2.1.1. its value is

1.2.1.1.1. =0

### 1.3. Electron

1.3.1. Negative charge

1.3.1.1. its value is

1.3.1.1.1. -1.602x10^-19 C

### 1.4. Proton

1.4.1. Positive charge

1.4.1.1. its value is

1.4.1.1.1. +1.602x10^-19 C

### 1.5. Law of charges

1.5.1. like charges repel each other, unlike charges attract each other

## 2. Conductor, insulator and semiconductor materials

### 2.1. Insulator

2.1.1. Material when an electric charge is placed, it will remain where it was placed

### 2.2. Conductor

2.2.1. Are those materials when electrons are added, they will distribute through the material.

## 3. Electric Field

### 3.1. Exists in the space around the region of an electric charge that experiments an electric force.

3.1.1. it has

3.1.1.1. magnitude and direction

3.1.1.1.1. E= F/q

## 4. Electric current

### 4.1. Unit

4.1.1. Ampere (A)

4.1.1.1. An ampere is a flow of 1 Coulumb per second.

### 4.2. defined as

4.2.1. The amount of electrons that flow through a conductor.

4.3.1. I=q/t

## 5. Electric potential energy

### 5.1. The energy gained by the charge due to its position in the electric field

5.1.1. also

5.1.1.1. The potential energy (V) between point A and point B is the work necessary to displace a unit of positive test change (+q) from A to B.

5.1.2. The potencial energy of a charge at point B compared to point A is equal to the work done against the electric forces needed to displace the charge from A to B

5.2.1. V= W/q

## 6. Coulumb's Law

### 6.2. K

6.2.1. constant

6.2.1.1. K= 9x10^9 Nm^2/C^2

## 7. Electrical Power

### 7.1. How fast work is done or the energy consumed per second

7.1.1. measured in

7.1.1.1. Watts (W)

7.1.1.1.1. Watt's Law

## 8. Electric Circuit

### 8.1. there are four

8.1.1. Simple

8.1.1.1. made of a source, resistance and wires.

8.1.2. Series

8.1.2.1. source with 2 or more resistors connected one after another.

8.1.3. Parallel

8.1.3.1. 2 or more resistors connected directly to a source.

8.1.4. Mixed

8.1.4.1. 2 or more resistance connected in series or more branches in parallel.

## 9. Ohm's Law

### 9.1. The intensity of the current of a circuit is directly proportional to the potential difference (voltage) and inversely proportional to the resistance.

9.1.1. its equation is

9.1.1.1. I= V/R

9.1.1.1.1. Voltage (V)

## 10. Electrical resistance

10.1.1. Ohmmeter

### 10.2. represented with letter (R)

10.2.1. opposition the conductors offer to electric current flow.

### 10.3. depends on the four factors

10.3.1. -nature of the substance (p) -temperature (t) -length of conductor (L) -area of the conductor (A)

10.3.1.1. represented with

10.3.1.1.1. R= p. L/A