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 voltage across a conductor is directly proportional to the current flowing through it, with the constant of proportionality being the resistance.

2. How Does the Calculator Work?

The calculator uses Ohm's Law formula:

Where:

• \( V \) — Voltage drop (volts)
• \( I \) — Current flowing through the resistor (amperes)
• \( R \) — Resistance of the resistor (ohms)

Explanation: The formula calculates the voltage drop across a resistor when current flows through it, based on the resistor's resistance value.

3. Importance of Voltage Drop Calculation

Details: Calculating voltage drop is essential for circuit design, ensuring proper component operation, preventing damage to electronic components, and maintaining stable power distribution in electrical systems.

4. Using the Calculator

Tips: Enter current in amperes and resistance in ohms. Both values must be positive numbers greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What is voltage drop?
A: Voltage drop is the decrease in electrical potential along the path of current flowing through an electrical circuit component.

Q2: Why is voltage drop important?
A: Excessive voltage drop can cause equipment malfunction, reduced efficiency, and potential safety hazards in electrical systems.

Q3: What are typical acceptable voltage drop values?
A: Generally, voltage drop should not exceed 3% for branch circuits and 5% for feeder and branch circuits combined in standard electrical installations.

Q4: Does voltage drop depend on wire length?
A: Yes, longer wires have higher resistance, which increases voltage drop for the same current flow.

Q5: 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.