1. What is Ohm's Law?

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

Where:

• \( I \) — Current measured in Amperes (A)
• \( V \) — Voltage measured in Volts (V)
• \( R \) — Resistance measured in Ohms (Ω)

Explanation: The formula shows that current increases with higher voltage and decreases with higher resistance in a linear DC circuit.

3. Importance of Current Calculation

Details: Accurate current calculation is crucial for circuit design, component selection, safety analysis, and ensuring proper operation of electrical devices and systems.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What is the unit of current?
A: Current is measured in Amperes (A), which represents the flow of electric charge per unit time.

Q2: Does Ohm's Law apply to AC circuits?
A: Ohm's Law applies to AC circuits only when considering instantaneous values or when dealing with purely resistive loads.

Q3: What are typical current values in household circuits?
A: Typical household circuits carry currents ranging from 5-20 Amperes, depending on the circuit design and intended use.

Q4: What factors affect resistance in a conductor?
A: Resistance depends on the material's resistivity, length, cross-sectional area, and temperature.

Q5: How does temperature affect resistance?
A: For most conductors, resistance increases with temperature, while for semiconductors, resistance typically decreases with temperature.