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 the Ohm's Law formula:

Where:

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

Explanation: The formula calculates the electric current flowing through a circuit when the voltage and resistance values are known.

3. Importance of Ohm's Law

Details: Ohm's Law is essential for designing and analyzing electrical circuits, troubleshooting electrical problems, and ensuring proper component selection in electronic devices.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What are the other forms of Ohm's Law?
A: The law can be rearranged as V = I × R (voltage calculation) and R = V / I (resistance calculation).

Q2: Does Ohm's Law apply 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 is the unit of electrical current?
A: The standard unit for electrical current is the ampere (A), named after French physicist André-Marie Ampère.

Q4: How accurate is Ohm's Law in real-world applications?
A: Ohm's Law provides excellent accuracy for DC circuits and resistive AC circuits, but may need modifications for reactive components like capacitors and inductors.

Q5: Can Ohm's Law be used for AC circuits?
A: Yes, but with modifications using impedance (Z) instead of resistance: I = V / Z, where impedance includes both resistance and reactance.