1. What is Ohm's Law?

Definition: Ohm's Law states that the voltage across a conductor is directly proportional to the current flowing through it, with resistance being the constant of proportionality.

Purpose: It's a fundamental principle in electrical engineering used to calculate voltage, current, or resistance in DC circuits.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: The current (in amps) is multiplied by the resistance (in ohms) to calculate the voltage (in volts).

3. Importance of Ohm's Law

Details: Understanding this relationship is crucial for designing and troubleshooting electrical circuits, ensuring proper component selection, and preventing circuit damage.

4. Using the Calculator

Tips: Enter the current in amperes and resistance in ohms. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Does Ohm's Law apply to AC circuits?
A: The basic form applies to purely resistive AC circuits. For circuits with inductance or capacitance, impedance must be considered.

Q2: What's a typical current for household circuits?
A: Most household circuits are 15-20 amps, though specific devices may draw more or less current.

Q3: How do I measure resistance?
A: Use a multimeter set to ohms (Ω) to measure resistance when the circuit is powered off.

Q4: What if I know voltage and want to find current?
A: Rearrange the formula: \( I = \frac{V}{R} \). We can add this calculation in future versions.

Q5: Why does my calculation not match real-world measurements?
A: Real circuits have additional factors like wire resistance, temperature effects, and component tolerances.