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 (Ω)
• \( V \) — Voltage (V)
• \( I \) — Current (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 (V) and current in amperes (A). Both values must be positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

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

Q2: Can Ohm's Law be applied to all materials?
A: Ohm's Law applies to ohmic materials where resistance remains constant regardless of voltage. Some materials like semiconductors are non-ohmic.

Q3: What is the relationship between power and resistance?
A: Power (P) can be calculated as P = V²/R or P = I²R, showing how resistance affects power dissipation in a circuit.

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

Q5: What are common applications of resistance calculations?
A: Resistance calculations are used in circuit design, electrical safety analysis, component selection, and troubleshooting electrical systems.