1. What is a Voltage Current Resistance Calculator?

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

Purpose: It helps electrical engineers, technicians, and students determine voltage in electrical circuits.

2. How Does the Calculator Work?

The calculator uses Ohm's Law formula:

Where:

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

Explanation: The current multiplied by resistance gives the voltage drop across a circuit element.

3. Importance of Ohm's Law Calculation

Details: Proper voltage calculation ensures correct circuit design, component selection, and electrical safety.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What if I know voltage and want to find current?
A: Rearrange the formula: \( I = \frac{V}{R} \)

Q2: What if I know voltage and want to find resistance?
A: Rearrange the formula: \( R = \frac{V}{I} \)

Q3: Does this work for AC circuits?
A: Yes, for purely resistive loads. For reactive components, use impedance instead of resistance.

Q4: What's a typical current for household circuits?
A: Most household circuits are 15-20 amps at 120 volts (North America).

Q5: How accurate is this calculation?
A: Perfectly accurate for ideal conditions. Real-world factors like temperature may affect results.