# Module Four: Electrical Theory

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Parallel circuits
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Terms in this set (28)
Parallel circuits
Circuits containing two or more parallel paths through which current can flow.
Series circuit
A circuit that has only one path for current flow.
Series-parallel circuits
Circuits that contain both series and parallel current paths.
electron flow theory
describes current flow from negative to positive (most electricians).
conventional electron flow
Frequently used by Electrical Engineers, describes current flow in the opposite direction (from positive to negative).
Resistance Calculations
Used to determine other circuit characteristics, such as voltage and current.
Intensity (I)
Current flowing through a circuit.
Ohm's Law
Ohm's Law Equation = (E / I x R). Used to find voltage (E), resistance (R), or current (I).
To find voltage
E = I x R
To find resistance
R = E/I
To find current
I = E/R
E
= voltage in volts (V)
I
current in amperes, or amps (A)
R
resistance in ohms (D.)
Power Equation
P = I x E. Used to find power (P), current (I), or voltage (E).