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's a fundamental principle in electrical engineering and physics.

2. How Does the Calculator Work?

The calculator uses Ohm's Law equation:

Where:

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

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

3. Importance of Ohm's Law

Details: Ohm's Law is essential for designing and analyzing electrical circuits, calculating power consumption, selecting appropriate components, and troubleshooting electrical systems.

4. Using the Calculator

Tips: Enter current in amperes and resistance in ohms. Both values must be positive numbers. The calculator will compute the voltage across the resistor.

5. Frequently Asked Questions (FAQ)

Q1: Can Ohm's Law be used for AC circuits?
A: The basic form applies to DC circuits. For AC circuits, impedance (which includes resistance and reactance) must be considered.

Q2: What are typical voltage values in household circuits?
A: In most countries, household circuits are either 110-120V or 220-240V, depending on the regional standards.

Q3: What happens if resistance is zero?
A: In theory, current would approach infinity (short circuit). In practice, all real circuits have some resistance.

Q4: How does temperature affect resistance?
A: For most conductors, resistance increases with temperature. Some materials (like semiconductors) show the opposite behavior.

Q5: What's the power relationship in Ohm's Law?
A: Power (P) can be calculated as P = V×I = I²×R = V²/R, showing how power relates to voltage, current, and resistance.