Current Formulas:
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Definition: This calculator determines the current in a circuit based on the voltage and resistances, for either series or parallel configurations.
Purpose: It helps electrical engineers, students, and hobbyists quickly calculate current in different circuit configurations.
The calculator uses different formulas for series and parallel circuits:
Where:
Explanation: In series circuits, resistances add up. In parallel circuits, the voltage across each resistor is the same.
Details: Proper current calculation ensures circuit components operate within their specifications and helps prevent overheating or damage.
Tips: Enter the voltage in volts, resistances (comma separated) in ohms, and select the circuit type. All values must be positive.
Q1: What's the difference between series and parallel circuits?
A: In series, current flows through components sequentially. In parallel, components share the same voltage points.
Q2: How do I calculate for mixed series-parallel circuits?
A: Break the circuit into series and parallel sections, calculate equivalent resistances, then combine results.
Q3: What happens if I enter 0 resistance?
A: The calculator will ignore 0 values in parallel circuits, but in series it would theoretically cause infinite current (short circuit).
Q4: Why is current higher in parallel circuits?
A: Each parallel branch provides an additional path for current, reducing total resistance and increasing total current.
Q5: Can I use this for AC circuits?
A: Only for purely resistive AC circuits. For reactive components, you need to consider impedance.