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)
• \( V \) — Voltage (volts)
• \( R \) — Resistance (ohms)

Explanation: The equation shows the relationship between voltage, current, and resistance in an electrical circuit.

3. Importance of Current Calculation

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

4. Using the Calculator

Tips: Enter voltage in volts and resistance in ohms. All values must be valid (voltage > 0, resistance > 0).

5. Frequently Asked Questions (FAQ)

Q1: What are the units for each variable?
A: Current (I) is in amperes (A), voltage (V) in volts (V), and resistance (R) in ohms (Ω).

Q2: Does Ohm's Law apply to all materials?
A: No, Ohm's Law applies only to ohmic materials where resistance remains constant regardless of voltage.

Q3: What is a typical current for household circuits?
A: Most household circuits are designed for 15-20 amps, though actual current depends on the connected load.

Q4: How does temperature affect resistance?
A: For most conductors, resistance increases with temperature. Semiconductors may show opposite behavior.

Q5: Can I calculate power with this?
A: Power can be calculated as P = V×I, but this calculator only determines current from voltage and resistance.