Enter your resistor values (up to 6) and choose your Resistance Unit to calculate the Total Series Resistance of your circuit — you'll also see the Largest Resistor Contribution and Current Through Circuit so you know exactly where the resistance is piling up.
Total Series Resistance
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Largest Resistor Contribution
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Current Through Circuit
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For resistors in series, the total resistance is simply the sum of all individual resistances: R_total = R1 + R2 + R3 + ... + Rn. This is because current flows through each resistor sequentially, and each resistor adds its resistance value to the total.
To find the total: 1.5 kΩ + 0.3 kΩ + 0.7 kΩ = 2.5 kΩ. Remember to convert all values to the same unit before adding. In this case, 300 Ω = 0.3 kΩ.
In a series circuit, current must flow through each resistor one after another. Each resistor opposes the current flow, so the total opposition (resistance) is the sum of all individual resistances. Think of it like obstacles in a single-lane road - each one adds to the total difficulty.
Resistance is always higher in series than in parallel. Series resistance equals the sum of individual resistances, while parallel resistance is always less than the smallest individual resistor in the circuit.
In a series circuit, the same current flows through all components. The current is determined by the total voltage divided by the total resistance (I = V/R_total). This current remains constant throughout the entire series path.
In series circuits, voltage drops across each resistor add up to the total supply voltage. Each resistor's voltage drop is proportional to its resistance value: V_resistor = I × R_resistor, where I is the constant current through the circuit.
Yes, you can connect different types of resistors (carbon, metal film, wire-wound, etc.) in series as long as their power ratings are adequate. The calculation method remains the same - just add up all the resistance values regardless of resistor type.