1. What Is Ohm's Law Resistance Formula?

Ohm's Law states that the resistance (R) in a circuit is equal to the voltage (V) divided by the current (I). This fundamental electrical formula describes the relationship between voltage, current, and resistance in an electrical circuit.

2. How Does The Calculator Work?

The calculator uses Ohm's Law formula:

Where:

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

Explanation: The formula shows that resistance is directly proportional to voltage and inversely proportional to current flowing through a conductor.

3. Importance Of Resistance Calculation

Details: Calculating resistance is essential for circuit design, troubleshooting electrical systems, selecting appropriate components, and ensuring electrical safety in various applications.

4. Using The Calculator

Tips: Enter voltage in volts and current in amperes. Both values must be positive numbers greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What is the unit of resistance?
A: The unit of resistance is the ohm (Ω), named after German physicist Georg Simon Ohm.

Q2: Can resistance be negative?
A: In conventional materials, resistance is always positive. Negative resistance occurs only in special semiconductor devices under specific conditions.

Q3: What factors affect resistance?
A: Resistance depends on material type, length, cross-sectional area, and temperature of the conductor.

Q4: How does temperature affect resistance?
A: For most conductors, resistance increases with temperature. For semiconductors, resistance typically decreases with temperature.

Q5: What is the difference between resistance and resistivity?
A: Resistance is a property of a specific object, while resistivity is an intrinsic property of a material regardless of its size or shape.