Ohm's Law and Conductance

Monday, July 30, 2018

12:32 PM

 

 

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Conductance

• Conductance is the ability of an element to conduct electric current
• It is the reciprocal of resistance
• Conductance G is measured in mho (Ʊ) or siemens (S).
• Siemens are amperes per volt

 

 

Linear vs Non-Linear Resistance

 

Linear

Most resistance have linear resistance, and obey Ohm's law

 

Non-Linear

Some circuit elements do not obey Ohm's Law, and have non-linear resistance, whose voltage varies with current

 

 

 

 

 

Power Dissipation

Note 1: Power in a resistor is always positive, since resistors always dissipate power

Note 2: Can only use these formulas in resistors