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

Explanation: The equation shows that current increases when voltage increases or resistance decreases, and vice versa.

3. Importance of Current Calculation

Details: Calculating current is essential for designing electrical circuits, selecting proper wire gauges, determining fuse sizes, 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: Can I use this for AC circuits?
A: This calculator is for DC circuits. For AC circuits, you need to consider impedance and phase angles.

Q2: What happens if resistance is zero?
A: In theory, current would approach infinity (short circuit). In practice, all real circuits have some resistance.

Q3: How accurate is this calculation?
A: The calculation is mathematically precise, but real-world factors like temperature and material properties may affect actual current.

Q4: Can I calculate voltage if I know current and resistance?
A: Yes, using the rearranged equation V = I × R.

Q5: What units should I use?
A: The calculator expects volts for voltage, ohms for resistance, and outputs amps for current.