1. What is Voltage Across Resistor in Series?

Definition: This calculator determines the voltage drop across a specific resistor in a series circuit using the voltage divider rule.

Purpose: It helps electronics engineers, students, and hobbyists analyze and design series circuits by calculating voltage distribution.

2. How Does the Calculator Work?

The calculator uses the voltage divider formula:

Where:

• \( V \) — Voltage across the resistor (volts)
• \( R \) — Resistance of the specific resistor (ohms)
• \( R_{total} \) — Total resistance of the series circuit (ohms)
• \( V_{total} \) — Total voltage applied to the circuit (volts)

Explanation: The voltage across each resistor in series is proportional to its resistance relative to the total resistance.

3. Importance of Voltage Division Calculation

Details: Accurate voltage calculation ensures proper circuit operation, prevents component damage, and helps in designing voltage references.

4. Using the Calculator

Tips: Enter the resistor value, total circuit resistance, and total applied voltage. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Does this work for parallel circuits?
A: No, this formula is specifically for series circuits. Parallel circuits use different calculation methods.

Q2: What if I have multiple resistors?
A: For multiple resistors in series, add all resistances to get R_total before using this calculator.

Q3: How accurate is this calculation?
A: This provides theoretical values. Real-world factors like temperature and component tolerances may affect actual voltages.

Q4: Can I use this for AC circuits?
A: For purely resistive AC circuits, yes. For circuits with capacitors/inductors, you need to consider impedance.

Q5: What happens if R > R_total?
A: This indicates an error since a single resistor's value can't exceed the total series resistance.