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 circuit analysis.

2. How Does the Calculator Work?

The calculator uses Ohm's Law equation:

Where:

• \( V \) — Voltage (volts)
• \( I \) — Current (amps)
• \( R \) — Resistance (ohms)

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

3. Importance of Ohm's Law

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

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: Does Ohm's Law apply to AC circuits?
A: Ohm's Law in its basic form applies to purely resistive DC circuits. For AC circuits, impedance must be considered instead of just resistance.

Q2: What are typical voltage values in circuits?
A: Common voltages include 1.5V (batteries), 5V (USB), 12V (automotive), 120V/240V (household AC).

Q3: How does resistance affect current?
A: For a given voltage, higher resistance results in lower current, and vice versa.

Q4: What materials obey Ohm's Law?
A: Ohmic materials (like most metals) obey Ohm's Law. Non-ohmic materials (like diodes) don't follow this linear relationship.

Q5: How is power related to Ohm's Law?
A: Power (P) can be calculated as P = V×I, or using Ohm's Law substitutions: P = I²×R or P = V²/R.