1. What is Ohm's Law?

Ohm's Law is a fundamental principle in electrical engineering that defines 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:

• \( V \) — Voltage (Volts)
• \( I \) — Current (Amperes)
• \( R \) — 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 designing electrical circuits, troubleshooting electrical problems, and ensuring the proper functioning of electronic devices.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What are the units of measurement in Ohm's Law?
A: Voltage is measured in volts (V), current in amperes (A), and resistance in ohms (Ω).

Q2: Can Ohm's Law be applied to all electrical circuits?
A: Ohm's Law applies to resistive circuits and is most accurate for DC circuits and AC circuits with purely resistive loads.

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

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 rearranged to solve for current or resistance?
A: Yes, the formula can be rearranged as \( I = V/R \) to calculate current, or \( R = V/I \) to calculate resistance.