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's a fundamental principle in electrical engineering and physics.

2. How Does the Calculator Work?

The calculator uses Ohm's Law equation:

Where:

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

Explanation: The equation shows that current increases with higher voltage and decreases with higher resistance.

3. Importance of Current Calculation

Details: Accurate current calculation is essential for designing electrical circuits, selecting appropriate components, and ensuring safe operation of electrical devices.

4. Using the Calculator

Tips: Enter voltage in volts and resistance in ohms. Both values must be positive numbers. The calculator will compute the current in amperes.

5. Frequently Asked Questions (FAQ)

Q1: What are typical current values in household circuits?
A: Typical household circuits in the US carry 15-20 amperes at 120 volts.

Q2: Does this work for AC and DC circuits?
A: The basic Ohm's Law applies to both AC and DC resistive circuits, though AC circuits with reactive components require additional considerations.

Q3: What happens if resistance is zero?
A: In theory, current would approach infinity (short circuit). In practice, all real circuits have some resistance.

Q4: Can I use this for non-ohmic materials?
A: No, Ohm's Law only applies to ohmic materials where resistance is constant regardless of voltage or current.

Q5: How does temperature affect the calculation?
A: Resistance changes with temperature in most materials, which would affect current if voltage remains constant.