1. What is Ohm's Law?

Ohm's Law states that the voltage across a resistor is directly proportional to the current flowing through it, with the constant of proportionality being the resistance.

2. How Does the Calculator Work?

The calculator uses Ohm's Law equation:

Where:

• \( V \) — Voltage (Volts)
• \( I \) — Current (Amperes)
• \( R \) — Resistance (Ohms)

Explanation: The equation shows the linear relationship between voltage and current in a resistor.

3. Importance of Voltage Calculation

Details: Calculating voltage drop across resistors is fundamental in circuit design, power management, and electronic device development.

4. Using the Calculator

Tips: Enter current in amperes (A) and resistance in ohms (Ω). All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is the unit of voltage?
A: Voltage is measured in volts (V).

Q2: Does this work for AC circuits?
A: The basic Ohm's Law applies to DC circuits. For AC circuits with reactive components, impedance must be considered.

Q3: What happens if resistance is zero?
A: In theory, voltage would be zero regardless of current, but in practice, zero resistance is impossible.

Q4: Can I calculate power with this?
A: Not directly, but power can be calculated as P = V × I once you have the voltage.

Q5: What about non-ohmic materials?
A: Ohm's Law only applies to ohmic materials where resistance is constant regardless of voltage or current.