# Electricity (1 of 3) Int2 Physics Mr FitzGerald

### 8 terms by FitzGera1d Teacher

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### What is the difference between conductors and insulators?

1) Electrons are free to move in a conductor
2) Electrons are not free to move in an insulator

### Give an example of conductors and insulators

All metals are conductors e.g iron
Most non metals are insulators e.g rubber

### What is electric current?

1) Movement of charges around a circuit
2) Measurement of how much charge passes a point each second

### What is Voltage?

It is a measure of the energy given to the charges in a circuit

### What is the effect of resistance on current?

Increasing the resistance decreases the current

### What are the 2 rules for a series circuit ?

1) Current same at all positions
2) Adding together the voltages of all the different components equals the supply voltage

### What are the 2 rules for a Parallel circuit ?

1) All branches get the supply voltage
2) Adding up the current in the branches equals the supply current

### What is a Potential Divider?

Two (or more) resistors connected across a supply sharing the voltage between them

Example: