1. What is Ohm's Law?

Ohm's Law is a fundamental principle in electrical engineering that defines the relationship between voltage, current, and resistance in an electrical circuit. It states that the current through a conductor between two points is directly proportional to the voltage across the two points.

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 formula calculates electrical resistance by dividing the voltage by the current flowing through a circuit.

3. Importance of Resistance Calculation

Details: Calculating resistance is crucial for designing electrical circuits, troubleshooting electrical problems, and ensuring proper component selection in electronic devices.

4. Using the Calculator

Tips: Enter voltage in volts and current in amps. Both values must be positive numbers greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What are the units for resistance?
A: Resistance is measured in ohms (Ω), named after German physicist Georg Ohm.

Q2: Can Ohm's Law be applied to all electrical components?
A: Ohm's Law applies to ohmic conductors where resistance remains constant. It doesn't apply to non-ohmic materials like diodes and transistors.

Q3: What if I have zero current or voltage?
A: If current is zero (open circuit), resistance is infinite. If voltage is zero (short circuit), resistance is zero.

Q4: How accurate is this calculation?
A: The calculation is mathematically precise for ideal conditions. Real-world factors like temperature and material properties may affect actual resistance values.

Q5: Can I calculate voltage or current using this formula?
A: Yes, the formula can be rearranged to calculate voltage (V = I × R) or current (I = V / R).