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Let's get started with the course. 
There are five modules in this course. 

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We are starting with module one, the 
background section. 

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The background section covers the basic 
topics of charge, current, voltage, and 

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power. 
So, we define each of these concepts a 

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little bit more from the physics 
perspective. 

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And then we will discuss what a resistor 
is, what voltage and current sources are, 

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and we will give some circuits. 
And the basic construct of a circuit 

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diagram.