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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 formula:
Where:
Explanation: The calculator automatically determines which value to calculate based on the two known values you provide. Leave the unknown value field empty or set to zero.
Details: Ohm's Law is essential for designing and analyzing electrical circuits, calculating power consumption, determining appropriate component values, and troubleshooting electrical systems. It forms the foundation for understanding more complex electrical concepts.
Tips: Enter any two known values (voltage in volts, current in amperes, resistance in ohms) and leave the third field empty or set to zero. The calculator will automatically compute the missing value. All values must be positive numbers.
Q1: What if I enter all three values?
A: The calculator will verify if the values satisfy Ohm's Law (V = I × R). If they don't match, it will recalculate based on the first two valid inputs.
Q2: Can I use this for AC circuits?
A: This calculator is designed for DC circuits. For AC circuits with reactive components, additional factors like impedance and phase angle need to be considered.
Q3: What are typical units for electrical calculations?
A: Voltage is measured in volts (V), current in amperes (A), and resistance in ohms (Ω). Power is measured in watts (W).
Q4: How accurate is this calculator?
A: The calculator provides precise mathematical results based on Ohm's Law. However, real-world applications may require consideration of factors like temperature effects, component tolerances, and circuit losses.
Q5: Can I calculate power with this calculator?
A: While this calculator focuses on V, I, and R relationships, power (P) can be calculated using P = V × I = I² × R = V²/R once you have the necessary values.