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 Ohm's Law equation:

Where:

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

Explanation: The equation shows that current increases when voltage increases, but decreases when resistance increases.

3. Importance of Current Calculation

Details: Calculating current is fundamental in electrical circuit design, ensuring components operate within their rated specifications and preventing damage from excessive current.

4. Using the Calculator

Tips: Enter voltage in volts and resistance in ohms. Both values must be positive numbers. The calculator will compute the current in amperes.

5. Frequently Asked Questions (FAQ)

Q1: What if my resistance is zero?
A: Resistance cannot be zero in this calculation as it would result in division by zero (infinite current), which is physically impossible.

Q2: Does Ohm's Law apply to all materials?
A: Ohm's Law applies to "ohmic" materials where resistance is constant. Some materials like diodes are non-ohmic.

Q3: What are typical current values in circuits?
A: Household circuits typically handle 15-20A, while electronic circuits often work with milliamps (mA) or microamps (μA).

Q4: How does temperature affect resistance?
A: For most conductors, resistance increases with temperature. Some materials like semiconductors show the opposite behavior.

Q5: Can I calculate power with this?
A: Power (P) can be calculated as P = V×I once you have the current value.