1. What is Current in a Resistor?

Definition: This calculator determines the electric current flowing through a resistor using Ohm's Law.

Purpose: It helps electrical engineers, technicians, and students calculate current in circuits for design, troubleshooting, and learning purposes.

2. How Does the Calculator Work?

The calculator uses Ohm's Law formula:

Where:

• \( I \) — Current (amperes)
• \( V \) — Voltage (volts)
• \( R \) — Resistance (ohms)

Explanation: The voltage across the resistor is divided by its resistance to determine the current flowing through it.

3. Importance of Current Calculation

Details: Proper current calculation ensures circuit components operate within their rated specifications and helps prevent damage from excessive current.

4. Using the Calculator

Tips: Enter the voltage across the resistor and its resistance. Resistance must be > 0 ohms.

5. Frequently Asked Questions (FAQ)

Q1: What if I get a negative voltage value?
A: The calculator uses absolute values as current direction isn't considered in magnitude calculations.

Q2: Can resistance be zero?
A: No, resistance must be greater than zero (R > 0) to avoid division by zero.

Q3: What units does this calculator use?
A: Standard units - volts for voltage, ohms for resistance, and amperes (amps) for current.

Q4: Does this work for AC circuits?
A: This calculates instantaneous magnitude. For AC, use RMS values for voltage.

Q5: How precise are the results?
A: Results are precise to 3 decimal places, suitable for most applications.