Resistors parallel
Resistors in Parallel - Parallel Connected Resistors
Laws of parallel connection
The voltage is the same everywhere in a parallel connection.
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The total current is the sum of all partial currents:
It = I1 + I2 + … + In (1)
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Determination of the total resistance:
It = I1 + I2 + … + In Eq.(1) divided by V
V V V V
according to the Law of Ohm follows
1 = 1 + 1 + … + 1
Rt R1 R2 Rn
Special case 1: All the resistors are of the same size
1 = n bzw. Rt = R / n
Rt R
Special case 2: Only 2 resistors are in parallel
1 = 1 + 1 = R2 + R1
Rt R1 R2 R2 * R1
Form reciprocal and it follows:
Rt = R2 * R1
R1 + R2