1. What is a Voltage and Amperage Calculator?

Definition: This calculator determines voltage based on current and resistance using Ohm's Law.

Purpose: It helps electrical engineers, technicians, and students quickly calculate voltage in DC circuits.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: The voltage across a conductor is directly proportional to the current flowing through it and its resistance.

3. Importance of Voltage Calculation

Details: Proper voltage calculation is essential for circuit design, troubleshooting, and ensuring electrical safety.

4. Using the Calculator

Tips: Enter the current in amperes and resistance in ohms. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is Ohm's Law?
A: Ohm's Law states that the current through a conductor between two points is directly proportional to the voltage across the two points.

Q2: Does this work for AC circuits?
A: This calculator is for DC circuits. For AC circuits, impedance must be considered instead of just resistance.

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

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

Q5: What if I know voltage and want to find current?
A: Rearrange the formula: \( I = \frac{V}{R} \)