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Ohm's Law Formula:
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Ohm's Law is a fundamental principle in electrical engineering that describes the relationship between voltage, current, and resistance in an electrical circuit. It states that the voltage across a conductor is directly proportional to the current flowing through it, with the constant of proportionality being the resistance.
The calculator uses Ohm's Law formula:
Where:
Explanation: The calculator converts milliamps to amps (dividing by 1000) and then multiplies by the resistance to calculate the voltage.
Details: Accurate voltage calculation is crucial for circuit design, troubleshooting electrical systems, component selection, and ensuring proper operation of electronic devices.
Tips: Enter current in milliamps (mA) and resistance in ohms (Ω). All values must be valid positive numbers. The calculator automatically converts mA to A for the calculation.
Q1: Why convert milliamps to amps?
A: Ohm's Law requires current in amperes, so milliamps must be converted by dividing by 1000 to get the correct voltage calculation.
Q2: What are typical voltage values in circuits?
A: Voltage values vary widely depending on the application, from millivolts in sensitive electronics to hundreds of volts in power systems.
Q3: Can this calculator be used for AC circuits?
A: This calculator uses the DC version of Ohm's Law. For AC circuits with reactive components, additional factors like impedance must be considered.
Q4: What if I have zero resistance?
A: Zero resistance would theoretically result in infinite current (short circuit). In practice, all materials have some resistance, and the calculator requires positive values.
Q5: How accurate is this calculation?
A: The calculation is mathematically precise based on Ohm's Law, but actual circuit behavior may vary due to factors like temperature, component tolerances, and non-ideal conditions.