1. What is an Amps from Voltage Calculator?

Definition: This calculator determines the electric current (in amperes) based on voltage and resistance using Ohm's Law.

Purpose: It helps electricians, engineers, and electronics enthusiasts calculate current flow in electrical circuits.

2. How Does the Calculator Work?

The calculator uses Ohm's Law formula:

Where:

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

Explanation: The voltage is divided by the resistance to calculate the current flowing through the circuit.

3. Importance of Current Calculation

Details: Proper current calculation ensures circuit safety, proper component selection, and prevents electrical overloads.

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 if I know power (watts) instead of resistance?
A: Use I = P/V where P is power in watts. We may add this option in a future version.

Q2: Does this work for AC and DC circuits?
A: This calculator works for DC circuits. For AC, you need to consider impedance (complex resistance).

Q3: What's a typical household circuit current?
A: Most household circuits in the US are 15-20 amps at 120 volts.

Q4: How do I measure resistance?
A: Use a multimeter set to ohms measurement when the circuit is powered off.

Q5: What happens if resistance is zero?
A: This would create a short circuit with theoretically infinite current, which is dangerous and should be avoided.