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Conductance Formula:
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The conductance formula calculates the ability of a material to conduct electric current. It is defined as the reciprocal of resistance and is measured in siemens (S). The formula relates conductance to the physical properties of the conductor.
The calculator uses the conductance formula:
Where:
Explanation: The formula shows that conductance is directly proportional to the cross-sectional area and inversely proportional to both the length of the conductor and its resistivity.
Details: Calculating conductance is essential for designing electrical circuits, selecting appropriate materials for conductors, and understanding the electrical properties of materials in various applications.
Tips: Enter the area in square meters, length in meters, and resistivity in ohm-meters. All values must be positive numbers greater than zero.
Q1: What is the relationship between conductance and resistance?
A: Conductance is the reciprocal of resistance (G = 1/R). While resistance measures opposition to current flow, conductance measures how easily current flows.
Q2: What are typical conductance values for common materials?
A: Good conductors like copper and silver have high conductance values (around 5.96 × 10⁷ S/m for copper), while insulators have very low conductance values.
Q3: How does temperature affect conductance?
A: For most conductors, conductance decreases as temperature increases due to increased atomic vibrations that impede electron flow.
Q4: What units are used for conductance?
A: Conductance is measured in siemens (S), which is equivalent to amperes per volt (A/V).
Q5: How is this formula different from conductivity?
A: Conductance (G) is the property of a specific object, while conductivity (σ) is an intrinsic property of a material. Conductivity = 1/ρ, where ρ is resistivity.