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 and inversely proportional to the resistance between them.

2. How Does the Calculator Work?

The calculator uses Ohm's Law formula:

Where:

• \( R \) — Resistance (Ω)
• \( V \) — Voltage (V)
• \( I \) — Current (A)

Explanation: The formula calculates the resistance value by dividing the voltage by the current flowing through the circuit.

3. Importance of Resistance Calculation

Details: Accurate resistance calculation is crucial for designing electrical circuits, selecting appropriate components, troubleshooting electrical problems, and ensuring circuit safety and efficiency.

4. Using the Calculator

Tips: Enter voltage in volts (V) and current in amperes (A). Both values must be positive numbers greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What are the units of measurement in Ohm's Law?
A: Voltage is measured in volts (V), current in amperes (A), and resistance in ohms (Ω).

Q2: Can Ohm's Law be applied to all electrical circuits?
A: Ohm's Law applies to resistive circuits and components that follow a linear relationship between voltage and current. It may not accurately describe the behavior of non-linear components like diodes and transistors.

Q3: What is the relationship between the three variables?
A: Resistance is directly proportional to voltage and inversely proportional to current. If voltage increases while current remains constant, resistance increases. If current increases while voltage remains constant, resistance decreases.

Q4: How accurate is this calculation for real-world applications?
A: The calculation provides theoretical values. In practical applications, factors like temperature, material properties, and component tolerances may affect actual resistance values.

Q5: Can I use this calculator for AC circuits?
A: This calculator uses the basic DC version of Ohm's Law. For AC circuits, impedance (which includes resistance, inductance, and capacitance) should be considered instead of pure resistance.