1. What is the Parallel Circuit Current Formula?

The parallel circuit current formula calculates the total current in a parallel electrical circuit by summing the currents through each parallel branch. This is based on Ohm's Law (I = V/R) applied to each resistor in parallel.

2. How Does the Calculator Work?

The calculator uses the parallel circuit current formula:

Where:

• \( I_{total} \) — Total current (A)
• \( V \) — Voltage across the circuit (V)
• \( R_i \) — Resistance of each parallel branch (Ω)

Explanation: In a parallel circuit, the voltage across each branch is the same, while currents add up. The calculator sums the current through each resistor (V/R) to get the total current.

3. Importance of Current Calculation

Details: Calculating total current is essential for circuit design, ensuring proper component selection, and preventing overload conditions in electrical systems.

4. Using the Calculator

Tips: Enter the circuit voltage in volts and all resistances in ohms (comma-separated). All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Why does current add 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 resistor in parallel fails?
A: Current continues to flow through the other branches, though total current will decrease.

Q3: How does this differ from series circuits?
A: In series, current is the same throughout, while in parallel, voltage is the same across branches.

Q4: What if resistances are zero?
A: Zero resistance would cause infinite current (short circuit), which is physically impossible in real circuits.

Q5: Can I use this for AC circuits?
A: This applies to DC circuits. For AC, you would need to consider impedance (Z) instead of just resistance.