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 the fundamental relationship between voltage, current, and resistance in an electrical circuit.

3. Importance of Current Calculation

Details: Calculating current is essential for circuit design, electrical safety, component selection, and troubleshooting electrical systems.

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: Does Ohm's Law apply to all materials?
A: Ohm's Law applies to "ohmic" materials where resistance is constant. Some materials (like semiconductors) are non-ohmic.

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

Q3: Can I calculate voltage if I know current and resistance?
A: Yes, the equation can be rearranged as V = I × R.

Q4: What are typical current values in household circuits?
A: Household circuits typically carry 15-20 amps. Smaller electronics might use milliamps (mA).

Q5: How does temperature affect resistance?
A: For most conductors, resistance increases with temperature. Some materials (like carbon) show decreased resistance with temperature.