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 equation:

Where:

• \( V \) — Voltage (volts)
• \( I \) — Current (amps)
• \( R \) — Resistance (ohms)

Explanation: The equation shows that voltage equals the product of current and resistance in a circuit.

3. Importance of Voltage Calculation

Details: Accurate voltage calculation is crucial for circuit design, troubleshooting electrical systems, ensuring proper component operation, and maintaining electrical safety standards.

4. Using the Calculator

Tips: Enter current in amps and resistance in ohms. All values must be valid positive numbers (current > 0, resistance > 0).

5. Frequently Asked Questions (FAQ)

Q1: What is the unit of measurement for voltage?
A: Voltage is measured in volts (V), named after the Italian physicist Alessandro Volta.

Q2: Can Ohm's Law be applied to all electrical circuits?
A: Ohm's Law applies to resistive circuits and components that follow a linear relationship between voltage and current. It may not apply to non-linear components like diodes and transistors.

Q3: What happens if resistance is zero?
A: If resistance is zero (short circuit), the current would approach infinity according to Ohm's Law, which is why fuses and circuit breakers are necessary for safety.

Q4: How does temperature affect resistance?
A: For most conductors, resistance increases with temperature. For semiconductors, resistance typically decreases with temperature.

Q5: Can Ohm's Law be used for AC circuits?
A: Yes, but with modifications using impedance instead of pure resistance, and considering phase differences between voltage and current.