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Ohm's Law Equation:
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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 resistance being the constant of proportionality.
The calculator uses the Ohm's Law equation:
Where:
Explanation: This equation shows that voltage increases linearly with both current and resistance. When current or resistance doubles, the voltage also doubles.
Details: Accurate voltage calculation is crucial for circuit design, component selection, power supply design, and electrical safety analysis. It helps determine if components will operate within their specified voltage ratings.
Tips: Enter current in amperes (A) and resistance in ohms (Ω). Both values must be positive numbers greater than zero. The calculator will compute the voltage across the resistor.
Q1: What is the difference between AC and DC voltage in this calculation?
A: Ohm's Law applies to both AC and DC circuits. For AC circuits, the values typically represent RMS (root mean square) values unless specified otherwise.
Q2: Can I use this for non-ohmic materials?
A: Ohm's Law applies specifically to ohmic materials where resistance remains constant. For non-ohmic materials like diodes and transistors, the relationship is not linear.
Q3: What are typical voltage ranges in electronic circuits?
A: Common voltages include 1.8V, 3.3V, 5V, 12V for digital circuits, and 120V/240V for household AC power.
Q4: How does temperature affect resistance and voltage?
A: For most conductors, resistance increases with temperature, which would affect voltage drop calculations in temperature-varying environments.
Q5: Can I calculate power from voltage using this result?
A: Yes, power can be calculated using P = V × I or P = V²/R once you have the voltage value.