1. What is Ohm's Law?

Ohm's Law states that the current through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance between them.

2. How Does the Calculator Work?

The calculator uses the Ohm's Law equation:

Where:

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

Explanation: The equation shows that current increases with higher voltage and decreases with higher resistance.

3. Importance of Current Calculation

Details: Calculating current is fundamental in circuit design, electrical safety, and determining appropriate component ratings.

4. Using the Calculator

Tips: Enter voltage in volts and resistance in ohms. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is the unit of current?
A: The unit of current is the ampere (amp), which represents one coulomb of charge passing per second.

Q2: Does Ohm's Law apply to all materials?
A: No, Ohm's Law applies only to ohmic materials (like most metals). Non-ohmic materials (like diodes) don't follow this linear relationship.

Q3: What happens if resistance is zero?
A: In theory, current would approach infinity (short circuit). In practice, all real circuits have some resistance.

Q4: Can I use this for AC circuits?
A: The basic form shown here is for DC circuits. For AC, you need to consider impedance (which includes resistance and reactance).

Q5: How accurate is this calculation?
A: The calculation is mathematically exact, but real-world measurements may have instrument errors and other factors.