1. What is a Resistor Calculator?

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

Purpose: It helps electricians, engineers, and electronics enthusiasts calculate resistance in electrical circuits.

2. How Does the Calculator Work?

The calculator uses Ohm's Law formula:

Where:

• \( R \) — Resistance (Ohms, Ω)
• \( V \) — Voltage (Volts, V)
• \( I \) — Current (Amperes, A)

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

3. Importance of Resistance Calculation

Details: Proper resistance calculation ensures safe and efficient electrical circuit design, preventing overloads and component damage.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What happens if current is zero?
A: Current cannot be zero in the calculation as it would result in division by zero (undefined resistance).

Q2: Can I use this for AC circuits?
A: This calculator works for DC circuits. For AC circuits with reactance, more complex calculations are needed.

Q3: What are typical resistance values?
A: Resistance varies widely from milliohms (mΩ) in conductors to megaohms (MΩ) in insulators.

Q4: How accurate is this calculation?
A: The calculation is theoretically perfect, but real-world factors like temperature and material purity affect actual resistance.

Q5: What if I know resistance and want to find voltage or current?
A: Use the other forms of Ohm's Law: V = I×R or I = V/R.