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 (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, following a linear relationship.

3. Importance of Current Calculation

Details: Accurate current calculation is crucial for circuit design, component selection, safety analysis, and ensuring electrical systems operate within their designed parameters without overheating or damage.

4. Using the Calculator

Tips: Enter voltage in volts (V) and resistance in ohms (Ω). Both values must be positive numbers greater than zero. The calculator will compute the current in amperes (A).

5. Frequently Asked Questions (FAQ)

Q1: What happens if resistance is zero?
A: If resistance is zero, it creates a short circuit with theoretically infinite current, which is dangerous and can damage components.

Q2: Can this calculator be used for AC circuits?
A: This calculator uses the basic DC version of Ohm's Law. For AC circuits with reactive components, impedance calculations are needed.

Q3: What are typical current values in household circuits?
A: Typical household circuits carry 15-20 amps, while smaller electronics may use milliamps (mA) or microamps (μA).

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

Q5: Can I calculate power using this information?
A: Yes, power can be calculated using P = V × I or P = I² × R once current is known.