1. What is Current in a Parallel Circuit?

Definition: In a parallel circuit, the total current is the sum of the currents through each individual branch.

Purpose: This calculator helps determine the total current drawn from the power source in a parallel circuit configuration.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( I_{total} \) — Total current (amps)
• \( V \) — Voltage across each branch (volts)
• \( R \) — Resistance of each branch (ohms)

Explanation: The current through each branch is calculated (V/R) and then summed to get the total current.

3. Importance of Parallel Circuit Current Calculation

Details: Proper current calculation ensures correct sizing of power supplies, wires, and circuit protection devices.

4. Using the Calculator

Tips: Enter the voltage applied to the circuit and all resistances (comma or space separated). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why does current add up in parallel circuits?
A: Each parallel branch provides an independent path for current, so the total current is the sum of all branch currents.

Q2: What happens if one resistance is much smaller than others?
A: The branch with smallest resistance will draw the most current and dominate the total current calculation.

Q3: How does voltage affect total current?
A: Higher voltage increases current proportionally in each branch (Ohm's Law: I = V/R).

Q4: What if resistances are equal?
A: With N equal resistances, total current will be N × (V/R) for each branch.

Q5: Does this work for AC circuits?
A: Yes, for purely resistive AC circuits. For reactive components, impedance must be used instead of resistance.