1. What is Ohm's Law?

Ohm's Law 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. It is a fundamental principle in electrical engineering and physics.

2. How Does the Calculator Work?

The calculator uses Ohm's Law equation:

Where:

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

Explanation: The equation shows the relationship between voltage, current, and resistance in an electrical circuit.

3. Importance of Resistance Calculation

Details: Calculating resistance is crucial for designing electrical circuits, troubleshooting electrical problems, and ensuring proper functioning of electronic devices.

4. Using the Calculator

Tips: Enter voltage in volts and current in amperes. Both values must be positive numbers greater than zero.

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 components?
A: Ohm's Law applies to ohmic materials where resistance remains constant regardless of voltage or current. It doesn't apply to non-ohmic components like diodes and transistors.

Q3: What is the relationship between power and Ohm's Law?
A: Power (P) can be calculated as P = V × I, or using variations that incorporate resistance: P = I² × R or P = V² / R.

Q4: How does temperature affect resistance?
A: For most conductors, resistance increases with temperature. For semiconductors, resistance typically decreases with temperature.

Q5: What are some practical applications of Ohm's Law?
A: Ohm's Law is used in circuit design, electrical safety calculations, determining appropriate wire sizes, and troubleshooting electrical systems.