Calculating Resistance and Impedance in an Electric Circuit

In summary, Conductance is a measure of an object's ability to conduct electricity and is the reciprocal of resistance. It is closely related to conductivity, which is measured in siemens per meter (S/m). The main difference between conductance and resistance is that conductance measures how easily electricity can flow through an object, while resistance measures how much an object impedes the flow of electricity. Conductance can be calculated by dividing the current by the potential difference or by taking the reciprocal of the resistance. Several factors, such as material, length, cross-sectional area, and temperature, can affect conductance.
  • #1
dietwater
7
0

Homework Statement


123984[/ATTACH]"]
physics.jpg



Homework Equations



H= (NI)/ (2(Pi)r)
V=IR

The Attempt at a Solution



a)

total resitance = 100ohms?
from this would the current be 0.12A

over 1ohm resistor: 0.12V

not sure if this is correct even. Any help would be much appreciated.
 

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  • #2


If I have calculated correctly, the total impedance is 104.40 ohms, [tex]\phi = 15.63^{o}[/tex] when the switch is open. Then you can use [tex]V = V_{source}\frac{Z_{R}}{Z_{total}}[/tex]
I'm not 100% that this is the way to do it though.
 
Last edited:

1. What is conductance in physics?

Conductance is a measure of an object's ability to conduct electricity. It is the reciprocal of resistance and is measured in siemens (S).

2. How is conductance related to conductivity?

Conductance and conductivity are closely related. Conductivity is a material's ability to conduct electricity, while conductance is the measure of an object's ability to conduct electricity. Conductivity is measured in siemens per meter (S/m) and is equal to the product of conductance and the cross-sectional area of the object divided by its length.

3. What is the difference between conductance and resistance?

Conductance and resistance are both measures of an object's ability to conduct electricity. The main difference is that conductance measures how easily electricity can flow through an object, while resistance measures how much an object impedes the flow of electricity. Conductance is the reciprocal of resistance.

4. How is conductance calculated?

Conductance is calculated by dividing the current (I) flowing through an object by the potential difference (V) across the object. It is represented by the equation G = I/V. Conductance can also be calculated by taking the reciprocal of the resistance (R).

5. What factors affect conductance?

Several factors can affect conductance, including the material of the object, its length, cross-sectional area, and temperature. Materials with high conductivity, such as metals, have a higher conductance than materials with low conductivity, such as rubber. Longer objects have higher resistance and lower conductance, while objects with larger cross-sectional areas have lower resistance and higher conductance. In general, higher temperatures decrease the conductance of a material.

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