1. What is Ohm's Law?

Ohm's Law is a fundamental principle in electrical engineering that describes 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 equation:

Where:

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

Explanation: The equation shows that current increases with higher voltage but decreases with higher resistance.

3. Importance of Current Calculation

Details: Accurate current calculation is essential for circuit design, electrical safety, component selection, and troubleshooting electrical systems.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What if I have zero resistance?
A: Zero resistance would create a short circuit with theoretically infinite current, which is dangerous and not physically possible in real circuits.

Q2: Does Ohm's Law apply to all materials?
A: Ohm's Law applies to ohmic materials where resistance remains constant. Some materials like semiconductors are non-ohmic.

Q3: What are typical current values in household circuits?
A: Household circuits typically carry 15-20 amps, while smaller electronics might use milliamps (thousandths of an amp).

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

Q5: Can I calculate power using Ohm's Law?
A: Yes, power (P) can be calculated as P = V×I, or by substituting Ohm's Law: P = V²/R or P = I²×R.