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 (amperes)
• \( V \) — Voltage (volts)
• \( R \) — Resistance (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 crucial 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 are the units of measurement?
A: Voltage is measured in volts (V), resistance in ohms (Ω), and current in amperes (A).

Q2: Can this calculator be used for AC circuits?
A: This calculator uses the basic DC version of Ohm's Law. For AC circuits, impedance (which includes resistance and reactance) should be used instead of pure resistance.

Q3: What is a typical current range for household circuits?
A: Typical household circuits in the US are 15 or 20 amps, while larger appliances may use 30-50 amp circuits.

Q4: How does temperature affect resistance?
A: For most conductors, resistance increases with temperature. This calculator assumes constant temperature conditions.

Q5: What if I get a very high current value?
A: High current values may indicate a short circuit or very low resistance path. Always ensure your circuit components can handle the calculated current.