1. What is a Resistor Calculator?

Definition: This calculator determines the resistance value using Ohm's Law based on voltage and current values.

Purpose: It helps electronics engineers, students, and hobbyists calculate the required resistance for circuits.

2. How Does the Calculator Work?

The calculator uses Ohm's Law formula:

Where:

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

Explanation: The voltage is divided by the current to calculate the resistance in ohms.

3. Importance of Resistance Calculation

Details: Proper resistance calculation ensures circuit safety, proper current flow, and component compatibility.

4. Using the Calculator

Tips: Enter the voltage in volts and current in amps. Current must be greater than 0.

5. Frequently Asked Questions (FAQ)

Q1: What if I get zero resistance?
A: This typically means either voltage is 0 or current is extremely high (approaching infinity).

Q2: Can I calculate resistance for AC circuits?
A: This calculator is for DC circuits. For AC, you need to consider impedance which includes reactance.

Q3: What's the practical application?
A: Useful for determining resistor values in circuit design or troubleshooting existing circuits.

Q4: How precise are the results?
A: Results are mathematically precise, but real-world components have tolerance ratings.

Q5: What if current is zero?
A: Division by zero is undefined. Current must be greater than zero.