1. What is Ohm's Law?

Ohm's Law 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. It is a fundamental principle in electrical engineering and physics.

2. How Does the Calculator Work?

The calculator uses the Ohm's Law equation:

Where:

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

Explanation: The equation shows the relationship between voltage, current, and resistance in an electrical circuit.

3. Importance of Ohm's Law

Details: Ohm's Law is essential for designing and analyzing electrical circuits, troubleshooting electrical problems, and understanding how electrical components interact in a system.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What are the units for resistance?
A: Resistance is measured in ohms (Ω), named after German physicist Georg Ohm.

Q2: Can Ohm's Law be applied to all materials?
A: Ohm's Law applies to ohmic materials where resistance remains constant regardless of voltage. Some materials like semiconductors are non-ohmic.

Q3: What if I know resistance and voltage but need current?
A: The formula can be rearranged as \( I = \frac{V}{R} \) to calculate current.

Q4: What if I know resistance and current but need voltage?
A: The formula can be rearranged as \( V = I \times R \) to calculate voltage.

Q5: How accurate is Ohm's Law in real-world applications?
A: For most conductors at constant temperature, Ohm's Law is highly accurate. Temperature changes can affect resistance in many materials.