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Ohm's Law:
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Ohm's Law is a fundamental principle in electrical engineering that describes the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit. It 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.
The calculator uses Ohm's Law equation:
Where:
Explanation: The calculator allows you to input any two known values and will calculate the missing third value using the Ohm's Law formula.
Details: Ohm's Law is essential for designing and analyzing electrical circuits, troubleshooting electrical problems, and understanding how different components interact in electronic systems. It forms the foundation for most electrical calculations and circuit design principles.
Tips: Enter any two of the three values (voltage, current, resistance) and the calculator will compute the missing value. All values must be positive numbers. Leave the field you want to calculate empty.
Q1: What are the units used in Ohm's Law?
A: Voltage is measured in volts (V), current in amperes (A), and resistance in ohms (Ω).
Q2: Can Ohm's Law be applied to AC circuits?
A: Yes, but for AC circuits with reactive components, additional considerations like impedance and phase angles need to be taken into account.
Q3: What is the power formula related to Ohm's Law?
A: Power (P) can be calculated as P = V × I, or using variations like P = I² × R or P = V² / R.
Q4: Are there limitations to Ohm's Law?
A: Ohm's Law applies to ohmic materials where resistance remains constant. It may not accurately describe non-ohmic materials like semiconductors or devices with changing resistance.
Q5: How accurate is this calculator?
A: The calculator provides precise calculations based on the input values. The accuracy depends on the precision of the values you enter.