1. What is a Series-Parallel Circuit Current Calculator?

Definition: This calculator determines the current flow in both series and parallel branches of a mixed circuit.

Purpose: It helps electrical engineers, students, and hobbyists analyze and design circuits with combined series and parallel components.

2. How Does the Calculator Work?

The calculator uses two fundamental formulas:

Where:

• \( I_{series} \) — Current through series components (amps)
• \( I_{parallel} \) — Current through parallel branch (amps)
• \( V \) — Applied voltage (volts)
• \( R_{eq} \) — Equivalent series resistance (ohms)
• \( R_{branch} \) — Resistance of parallel branch (ohms)

Explanation: The calculator applies Ohm's Law separately to series and parallel portions of the circuit.

3. Importance of Current Calculation

Details: Accurate current calculation ensures proper component sizing, prevents overheating, and verifies circuit functionality.

4. Using the Calculator

Tips: Enter the circuit voltage, total series resistance, and parallel branch resistance. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between series and parallel current?
A: In series, current is the same throughout. In parallel, current divides among branches based on resistance.

Q2: How do I find total equivalent resistance?
A: For series: sum all resistances. For parallel: use 1/R_total = 1/R₁ + 1/R₂ + ...

Q3: Does this account for multiple parallel branches?
A: No, this calculates current for one parallel branch. For multiple branches, calculate each separately.

Q4: What if my parallel branch has multiple resistors?
A: First calculate the equivalent resistance of that branch, then use that value here.

Q5: How does voltage affect the current?
A: Current is directly proportional to voltage (higher voltage = higher current for same resistance).