1. What is a Voltage Calculator?

Definition: This calculator determines the voltage across a resistor using Ohm's Law, based on the current flowing through it and its resistance.

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

2. How Does the Calculator Work?

The calculator uses Ohm's Law formula:

Where:

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

Explanation: The voltage across a resistor is equal to the product of the current flowing through it and its resistance.

3. Importance of Voltage Calculation

Details: Accurate voltage calculations are essential for circuit design, troubleshooting, and ensuring components operate within their specified ranges.

4. Using the Calculator

Tips: Enter the current in amperes and resistance in ohms. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Does this work for AC circuits?
A: Yes, for purely resistive AC circuits. For reactive components (inductors/capacitors), you need to consider impedance.

Q2: What's a typical current range?
A: Common currents range from milliamps (0.001A) to several amps, depending on the circuit.

Q3: How accurate is this calculation?
A: It's theoretically exact for ideal resistors. Real-world factors like temperature may affect actual values.

Q4: Can I calculate current if I know voltage and resistance?
A: Yes, using I = V/R. We may add this functionality in a future version.

Q5: What about power calculation?
A: Power (P) can be calculated as P = V×I or P = I²×R once you know the voltage.