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RedDead said:
Equivalent resistance is the total resistance of a circuit that can be replaced by a single resistor without changing the current or voltage in the circuit.
For a series circuit, the equivalent resistance is the sum of all the individual resistances in the circuit. This can be calculated using the formula Req = R1 + R2 + R3 + ... + Rn, where R1, R2, R3, etc. are the individual resistances.
The formula for equivalent resistance in a parallel circuit is 1/Req = 1/R1 + 1/R2 + 1/R3 + ... + 1/Rn, where R1, R2, R3, etc. are the individual resistances. This formula takes into account the fact that in a parallel circuit, the total resistance is less than the individual resistances.
To determine the equivalent resistance of a complex circuit, you can use the combination of series and parallel circuit rules. First, simplify the circuit by reducing any series or parallel combinations into a single equivalent resistor. Then, apply the series and parallel formulas to find the final equivalent resistance.
No, the equivalent resistance of a circuit can never be greater than the sum of its individual resistances. This is because adding resistors in series always increases the total resistance, and adding resistors in parallel always decreases the total resistance. Therefore, the equivalent resistance will always fall between the highest and lowest individual resistances in the circuit.
