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

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

Q2: What are typical current values in household circuits?
A: Household circuits typically carry 15-20 amps, while small electronics might use milliamps (mA).

Q3: How does temperature affect resistance?
A: For most conductors, resistance increases with temperature. For semiconductors, resistance typically decreases.

Q4: What's the difference between AC and DC current?
A: DC (direct current) flows in one direction, while AC (alternating current) changes direction periodically.

Q5: How do you measure current in a circuit?
A: Current is measured with an ammeter connected in series with the circuit.