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.

2. How Does the Calculator Work?

The calculator uses Ohm's Law equation:

Where:

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

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

3. Importance of Current Calculation

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

4. Using the Calculator

Tips: Enter voltage in volts (V) and resistance in ohms (Ω). Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What if my resistance is zero?
A: Resistance cannot be zero in this calculation as it would result in division by zero (infinite current), which is not physically possible.

Q2: Does this work for AC circuits?
A: This simple form applies to DC circuits. For AC circuits, impedance (which includes reactance) must be considered.

Q3: What are typical current values in household circuits?
A: Household circuits typically carry currents from 0.5A to 15A, with circuit breakers usually rated for 15A or 20A.

Q4: How does temperature affect resistance?
A: Resistance typically increases with temperature for conductors (positive temperature coefficient) and decreases for semiconductors (negative temperature coefficient).

Q5: Can I use this for non-ohmic materials?
A: Ohm's Law only applies to ohmic materials where resistance is constant regardless of voltage. For non-ohmic materials (like diodes), more complex models are needed.