Electricity Y9 1
- Created by: Luuuuucy123
- Created on: 13-01-21 10:59
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- Electricity
- Current is the flow of charge/electrons (negatively charged). It is measured in amperes using an ammete
- As soon as the light bulb is switched on, electrons start to flow because the voltage causes the electrons to start moving.
- Electrons have negative charge and so are attracted to the positive terminal of the cell.
- Charge
- The unit of flow of charge Amperes (I) = 'Amps'
- The units to measure potential difference = voltmeter in parallel.
- The charge that flows in a set time can be calculated using the equation: Charge (Q) = Current (l)*Time(t)
- Parallel Circuit
- One route for the current to take
- Junctions that allow the current to take different routes
- Ammeter = A, placed in series to the component
- Current is shared between loop in parallel
- Current can be split between branches, equally or not
- Potential Difference
- Potential Difference is also known as voltage
- The voltage tells you the size of the force which pushes the charges (electrons)
- Voltage (volts, or v) is measured using a voltmeter which is connected in parallel to the component.
- Potential difference is shared between bulbs.
- The bulbs get dimmer when more are added to the circuit.
- The sum of the voltage across each component will equal the voltage of the supply.
- The unit of charge (Q) = Coulombs 'C'
- Circuits
- The unit of time (t) = Seconds 's'
- The potential difference of each component is the same as the potential difference of the battery
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