1. What is Ohm's Law Calculator?

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

Purpose: It helps electricians, engineers, and students quickly calculate resistance in electrical circuits.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: Resistance equals voltage divided by current in a circuit.

3. Importance of Ohm's Law

Details: Understanding resistance is crucial for circuit design, troubleshooting, and ensuring electrical safety.

4. Using the Calculator

Tips: Enter the voltage in volts and current in amps. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What if I know resistance and want to find voltage?
A: Use \( V = I \times R \). Voltage equals current multiplied by resistance.

Q2: What if I know resistance and want to find current?
A: Use \( I = \frac{V}{R} \). Current equals voltage divided by resistance.

Q3: What's a typical resistance value?
A: Resistance varies widely depending on the material and circuit. Common resistors range from 1 ohm to several megaohms.

Q4: Does this work for AC circuits?
A: The basic form works for DC circuits. For AC, impedance calculations are more complex.

Q5: What units should I use?
A: Always use volts for voltage, amps for current, and ohms for resistance.