# Electricity

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- Created by: Jxss.lx
- Created on: 07-06-18 17:12

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- Electricity
- Electric charge & Current
- Electric charge
- Measured in Coulombs (C)
- Q = It
- Charge = Current X time

- Electric current
- The flow of electric charge
- The greater the rate of flow, the greater the current

- Measures in Amperes/Amps (A)
- Using an a meter

- Stays the same throughout series circuit
- Splits in a parallel circuit

- The flow of electric charge

- Electric charge
- Resistors and Other Components
- Potential difference-current graphs (V-I graphs)
- Show the relationship between voltage and current
- Straight line through origin
- Voltage and current are directly proportional
- Resistance is constant

- Voltage and current are directly proportional
- Steep gradient
- Low resistance
- Large current and small voltage

- Low resistance
- Shallow gradient
- Large potential difference is needed for small current
- High resistance

- Large potential difference is needed for small current
- Non linear graph (not straight line)
- The value of R is not constant
- Resistance changes as current changes

- The value of R is not constant

- Resistors
- Ohmic conductor
- Current is directly proportional to potential difference
- At constant temp
- Resistance remains constant as current changes
- At constant temp

- Current is directly proportional to potential difference

- Ohmic conductor
- Filament lamps
- As current increase, temperature increases

- Diodes
- Current will only flow in one direction
- Very high resistance in opposite direction
- Shown by horizontal line along x-axis
- No current flows

- Current will only flow in one direction
- Thermistors
- Resistance decreases as temp increases
- Useful in circuits where temp control or response is needed
- Useful in thermostat circuits to switch off at certain temps

- Useful in circuits where temp control or response is needed

- Resistance decreases as temp increases
- Light Dependent Resistors
- Resistance decreases as light intensity increases
- Untitled

- Resistance decreases as light intensity increases

- Potential difference-current graphs (V-I graphs)

- Electric charge & Current

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