The association of resistors is very common in various systems, when we want to achieve a level of resistance that only one resistor is not sufficient. Any association of resistors will be represented by the equivalent resistor representing the total resistance of the resistors associated with it.
Association In Series
In an association of resistors in series, the equivalent resistor is equal to the sum of all the resistors that make up the association. The equivalent resistance of an association in series will always be greater than the resistor increased strength of the association. Here's why:
- - The electric current passing in each resistor of the association is always the same: i = i1 = i2 = i3 = i4 [...];
- The voltage in electric generator is equal to the sum of all the resistors voltages: V = V1 + V2 + V3 + V4 [...];
- The equation that calculates the stress at a point of the circuit is: V = R. i, then we have the final equation: Req. i = R1. i1 + R2. i2 + R3. i3 + R4. i4 [...].
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