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Ohmic Resistance is the material's opposition to the flow of electric current, measured in ohms. It represents the inherent resistance that a material offers to the passage of electric current.
The calculator uses the formula:
Where:
Explanation: This formula directly applies Ohm's Law, where resistance is calculated as the ratio of voltage to current in a circuit.
Details: Calculating ohmic resistance is fundamental in electrical engineering and circuit design. It helps in determining power consumption, heat dissipation, and overall circuit efficiency. Accurate resistance calculation is crucial for proper component selection and system optimization.
Tips: Enter supply voltage in volts and electric current in amperes. Both values must be positive numbers greater than zero for accurate calculation.
Q1: What is the difference between ohmic and non-ohmic resistance?
A: Ohmic resistance follows Ohm's Law (V=IR) linearly, while non-ohmic resistance doesn't maintain a constant ratio between voltage and current.
Q2: Can this calculator be used for AC circuits?
A: This calculator is designed for DC circuits. For AC circuits, impedance calculations involving reactance components are required.
Q3: What are typical resistance values in electrical systems?
A: Resistance values vary widely from milliohms in power systems to megaohms in electronic circuits, depending on the application and components used.
Q4: How does temperature affect resistance?
A: For most conductors, resistance increases with temperature. The relationship is described by the temperature coefficient of resistance.
Q5: When should resistance measurement be performed?
A: Resistance should be measured when troubleshooting circuits, verifying component specifications, designing new circuits, or assessing insulation integrity.