1. What is a Resistor Calculator by Ohm's Law?

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

Purpose: It helps electrical engineers, technicians, and hobbyists calculate resistance in circuits when voltage and current are known.

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 current to determine the resistance in a circuit.

3. Importance of Resistance Calculation

Details: Proper resistance calculation ensures circuit safety, proper component selection, and efficient electrical system design.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What happens if current is zero?
A: The calculator won't compute as division by zero is undefined. Current must be greater than zero.

Q2: Can I use this for AC circuits?
A: This calculates DC resistance. For AC, you need to consider impedance which includes reactance.

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

Q4: How accurate is this calculation?
A: It's mathematically precise for ideal conditions. Real-world factors like temperature may affect actual resistance.

Q5: Can I calculate voltage or current if I know resistance?
A: Yes, using other forms of Ohm's Law: V = I×R or I = V/R.