1. What is Ohm's Law?

Definition: Ohm's Law states that the current through a conductor between two points is directly proportional to the voltage across the two points.

Purpose: It helps electrical engineers, technicians, and students calculate current, voltage, or resistance in electrical circuits.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: The voltage is divided by the resistance to calculate the current flowing through the circuit.

3. Importance of Current Calculation

Details: Proper current calculation ensures circuit safety, proper component selection, and efficient power usage.

4. Using the Calculator

Tips: Enter the voltage in volts and resistance in ohms. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What if I know current and want to find voltage?
A: Use \( V = I \times R \). Multiply current by resistance to find voltage.

Q2: What if I know current and want to find resistance?
A: Use \( R = \frac{V}{I} \). Divide voltage by current to find resistance.

Q3: Does this work for AC circuits?
A: For purely resistive AC circuits, yes. For circuits with capacitors or inductors, you need to consider impedance.

Q4: What are typical resistance values?
A: Resistors range from milliohms to megaohms depending on application.

Q5: What's the relationship between power and Ohm's Law?
A: Power \( P = V \times I \), which can also be expressed as \( P = I^2 \times R \) or \( P = \frac{V^2}{R} \).