P2
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What happens to resistance in a series circuit?Why
The more components makes the resistance greater due to there being only 1 path
How is electricity distributed?
Through the national grid
Why are power cables at high voltage?
To make transmission more efficient
How is Voltage increased?
With a step up transformer
What is a step down performer?
Something that reduces Voltage, usually before entering buildings
Why is a step down transformer used?
To make the voltage safe before entering buildings
Explain Current and what it’s measured in
The flow of electrical charge Measured in Amps
Explain what Potential Difference is and what its measured in
Energy transferred per unit charge (the push/drive) Measured in Volts
Explain Resistance and what it’s measured in?
The opposite of current,it resists the speed of electrical charge Measured in Ohms
Explain Charge and what it’s measured in
The amount of electricity carried by particles Measured in Coulombs
In the practical about the length of a wire affecting resistance What’s the IV,DV,CV?
IV-Length of the wire DV- The Resistance CV-Amount of power supplied
What are the steps for the Length of a wire affecting resistance practical?
1.Set up circuit 2.Measure different length of wire 3.Record Current and Voltage 4.Increase wire length 5.Plot graph
How do you calculate Resistance?
Resistance=Potential difference/Current
What happens to resistance as the length of wire increase?
The resistance increases as length of wire gets longer
How could you adapt the length of a wire affecting resistance practical to measure resistance across a bulb?
Make the Voltmeter parallel to the Bulb
What is an LDR?
Light Dependent Resistor
What is a Thermistor?
A type of resistor that changes with temperature