1. What is Ohm's Law?

Ohm's Law is a fundamental principle in electrical engineering that defines 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 (A)
• \( V \) — Voltage in volts (V)
• \( R \) — Resistance in ohms (Ω)

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

3. Importance of Current Calculation

Details: Accurate current calculation is essential for circuit design, electrical safety analysis, 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 for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What are the units of measurement?
A: Voltage is measured in volts (V), resistance in ohms (Ω), and current in amperes (A).

Q2: Does Ohm's Law apply 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 the three quantities?
A: Current is directly proportional to voltage and inversely proportional to resistance. Double the voltage doubles the current; double the resistance halves the current.

Q4: Can I calculate power using these values?
A: Yes, electrical power can be calculated as P = V × I or P = I² × R or P = V² / R.

Q5: What are typical current values in household circuits?
A: Typical household circuits operate at 15-20 amperes, with voltage typically at 120V or 240V depending on the country.