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Ohm's Law Formula:
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Ohm's Law is a fundamental principle in electrical engineering that defines the relationship between voltage, current, and resistance 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 formula calculates the total current flowing through a circuit by dividing the applied voltage by the total resistance in the circuit.
Details: Accurate current calculation is essential for circuit design, component selection, safety analysis, and ensuring proper operation of electrical systems. It helps prevent overloading components and ensures efficient power distribution.
Tips: Enter voltage in volts and total resistance in ohms. Both values must be positive numbers greater than zero for accurate calculation.
Q1: What is the unit of measurement for current?
A: Current is measured in amperes (A), which represents the flow of electric charge per unit time.
Q2: Can this calculator be used for AC circuits?
A: This calculator uses the basic DC version of Ohm's Law. For AC circuits, additional factors like impedance and phase angle need to be considered.
Q3: What happens if resistance is zero?
A: In theory, current would approach infinity, but in practice, this represents a short circuit which is dangerous and can damage components.
Q4: How does temperature affect resistance?
A: For most conductors, resistance increases with temperature. This calculator assumes constant temperature conditions.
Q5: Can I use this for parallel and series circuits?
A: Yes, but you must first calculate the equivalent total resistance for the circuit configuration before using this calculator.