1. What is Ohm's Law?

Ohm's Law is a fundamental principle in electrical engineering that states 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 the mathematical relationship between voltage, current, and resistance in an electrical circuit.

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 for current calculation?
A: Current is measured in amperes (A), voltage in volts (V), and resistance in ohms (Ω).

Q2: Can this calculator be used for AC circuits?
A: This calculator is designed for DC circuits. For AC circuits, additional factors like impedance and phase angle must be considered.

Q3: What is a typical current range for household circuits?
A: Typical household circuits operate at 15-20 amperes, with standard voltages of 120V or 240V depending on the country.

Q4: How does temperature affect resistance?
A: For most conductors, resistance increases with temperature. This effect is more pronounced in materials with positive temperature coefficients.

Q5: Can Ohm's Law be applied to semiconductors?
A: Ohm's Law applies primarily to ohmic materials (linear resistors). Semiconductors often exhibit non-linear behavior and require more complex models.