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sdekivit
#3
Jul24-06, 04:36 AM
P: 92
you must take all the resistor together to make 1 substitutional resistane using the following rules:

1. serial placed resistance: [tex]R_{subst.} = \Sigma R[/tex] and U is divided over the resistors.

2. parallel circuit: [tex]\frac {1} {R_{subst.}} = \Sigma \frac {1} {R}[/tex] and I is divided over the resistors.