1. What is Ohm's Law?

Ohm's Law states that the voltage across a resistor is directly proportional to the current flowing through it, with the constant of proportionality being the resistance. It's a fundamental principle in electrical engineering and physics.

2. How Does the Calculator Work?

The calculator uses Ohm's Law equation:

Where:

• \( V \) — Voltage drop (Volts)
• \( I \) — Current (Amperes)
• \( R \) — Resistance (Ohms)

Explanation: The equation shows the linear relationship between voltage, current, and resistance in an ideal resistor.

3. Importance of Voltage Calculation

Details: Calculating voltage drop is essential for circuit design, ensuring components receive proper operating voltage and preventing damage from overvoltage.

4. Using the Calculator

Tips: Enter current in amperes (A) and resistance in ohms (Ω). Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Does Ohm's Law apply to all components?
A: Ohm's Law applies to ohmic materials (like resistors) but not to non-ohmic components like diodes or transistors.

Q2: What are typical voltage drops in circuits?
A: Voltage drops depend on current and resistance. Common values range from millivolts to hundreds of volts in different applications.

Q3: How does temperature affect resistance?
A: Resistance typically increases with temperature for conductors, while it decreases for semiconductors.

Q4: Can I calculate power with this?
A: Power can be calculated as P = V×I or P = I²×R once you know the voltage drop.

Q5: What about AC circuits?
A: For AC circuits with purely resistive loads, Ohm's Law applies to RMS values. For reactive components, impedance must be considered.