Tuesday, 27 March 2012

OHMS LAW and ETC



Serises and Parallel Circuits



Series Circuit Rules

1. Current is the same everywhere in the circuit. (kirchoffs Laws)

2. Rt (total Resistance) is the SUM of each resistive unit. (Add them all together)

3. Voltage drop across each resistive unit when added up will equal the applied voltage. (kirchoffs Laws) Or, voltage gets used up pushing throught the circuit, and the part that has more resisitance will use up more voltage.

4. If the resistance of each resistor is different, then the voltage drop will be different across each resistor.

Serise circuit example :




Parallel Circuit Rules

1. At (total amperage) equals the SUM of all CURRENT branches. (Add them all together)

2. Rt is less than any one branch resistance. Rt = (R1 x R2) / (R1 + R2)

3. Applied voltage is the same at all branches.

Parallel circuit example:


W = Watt
V = Volt
I = Amp
R = Resistance

Formulae:

V = I x R
I = V / R
R = V / I
W = I x V

Ps: A proper Circuits needs:

Counductor
Power Source
Load
Switch
Protection Device

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