1. What is Current in Electricity?

Definition: Electric current is the flow of electric charge, measured in amperes (amps).

Purpose: This calculator helps determine the current flowing through a circuit using Ohm's Law.

2. How Does the Calculator Work?

The calculator uses Ohm's Law formula:

Where:

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

Explanation: Current is directly proportional to voltage and inversely proportional to resistance.

3. Importance of Current Calculation

Details: Proper current calculation ensures circuit safety, proper component selection, and efficient electrical system design.

4. Using the Calculator

Tips: Enter the voltage in volts and resistance in ohms. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What happens if resistance is zero?
A: Current would theoretically approach infinity (short circuit), which is dangerous and impractical.

Q2: What's a typical household current?
A: Most household circuits carry 15-20 amps at 120 volts (US) or 230 volts (Europe).

Q3: How does current relate to power?
A: Power (watts) = Current (amps) × Voltage (volts).

Q4: What's the difference between AC and DC current?
A: DC flows in one direction; AC alternates direction. This calculator works for both.

Q5: Why is current measurement important?
A: It helps prevent circuit overloads, ensures proper wire sizing, and protects electrical components.