P5
- Created by: Avani.Shanbhag27
- Created on: 05-03-15 18:12
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- P5-Electricity
- Static Electricity
- Circuits
- Series
- The current is the same across the circuit
- The potential difference is different around components because voltage is shared. When added up it is the same as the potential difference of the battery.
- Resistance adds up from the individualcomponents
- Parallel
- Total current is shared between branches and all components
- The potential difference is the same across all components(including battery) as the voltage is the same everywhere in the circuit
- Potential difference is the 'work done'- the amount of energy transferred / voltage between two points in a circuit.
- Series
- The current is the same across the circuit
- The potential difference is different around components because voltage is shared. When added up it is the same as the potential difference of the battery.
- Resistance adds up from the individualcomponents
- Voltmeter measures this in Volts,
- The Voltmeter must be placed in parallel with a component so it can compare the energy the charge has before and after passing through the component.
- When energy is transferred, 'work is done'
- Series
- Symbols
- REMEMBER WHAT THEY LOOK LIKE
- The voltage of a battery shows how much work the battery will do to the charge that passes through it(how big a "push" it gives it)
- Series
- Resistance
- Voltage divided by Current
- Measured in Ohms
- Transformers
- Only uses AC
- Step up
- More turns on the secondary coil.
- Increases voltage
- Step down
- more turns on the primary coil
- Decrease voltage
- 4 things needed to change the size of a voltage
- Add an Iron Core
- Increasing turns on a coil
- Increasing speed of rotation
- Increasing the strength of the magnetic field
- Electromagn-etic Induction
- Generators
- Motors
- Uses DC
- Fleming's Left Hand Rule
- thuMb Motion
- First finger Field
- Second finger Current
- What can electric motors be used in?
- Washing Machines, Fridges, and Vacuum cleaners
- In a DVD player
- Magnetic Fields
- Current
- Voltage divided by Resistance
- Measured with ammeter, amps
- Flow of free electrons
- The split -ring commutator is a clever way of swapping the electrical contacts every half turn
- This reverses the direction of the current every half turn to keep the coil rotating continuously in the same direction
- Motors
- Uses DC
- Fleming's Left Hand Rule
- thuMb Motion
- First finger Field
- Second finger Current
- What can electric motors be used in?
- Washing Machines, Fridges, and Vacuum cleaners
- In a DVD player
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