Source----protection----control----consumer.
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Series circuit
There is only one voltage supply to the circuit voltage must pass to each consumer therefore it's shared by all consumers, not necessary equally, but depending on the varying resistances of the circuit.
The current is the same in all areas of the circuit.
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Parallel Circuit:
A parallel circuit has more than one input and output, depending on the number of electrical consumers.
Each consumer therefore has its own input and output.
Current draw for this circuit is high!
(The total Resistance of a parallel circuit is Always smaller than the smallest Resistor)
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Compound:
Series/Parallel Circuit or Compound Circuit:This circuit is made up of part series and part parallel combinations.
When doing calculations in compound circuits, always work out the total resistance of the parallel area first.
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Potential difference (Symbol=E), measured in volts.
The difference between the high potential positive terminal and the low potential negative terminal when using a volt meter.
Electromotive force is another term for(E) but refers to the voltage between the termianls of the alternator or the battery with no load applied.
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Hertz (Symbol=Hz) is the unit of frequency this is defined as the number of cycles per second.
Farad: A farad is the unit of capacitance defined by the radio of charge stored on the plates of a capacitor to the potential difference between the plates. Example: if 56mA current cause the voltage across a capacitance of 56mF.
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Electrical Calculations.
This formula is used to find total resistance of a parallel circuit at level four.
1/Rt=1/R1+1/R2+1/R3
Calculate the total resistance using the formula for parallel circuit and the current flow through the circuit.
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