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Hello again.

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Now let's talk about type of column.

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There are two types of current.

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The time is in her mind but only by the direction the current flows through a conductor.

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The first type is direct current or DC flaws in only one direction negative toward positive bowl of

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Source The second type is alternate in current flows back and forth because the bonds of the source

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alternate between positive and negative.

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This means that if the current alternatives from flowing in one direction one minute and then reversing

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to the other direction the next moment the current is alternative current.

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Now let's look at this schematic as you can see the schematic shows AC current vocabulary.

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This is the maximum positive value.

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And this is the maximum negative value.

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This line and this line uh this is the value to measure the voltage or current.

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As you can see starting from zero it will go.

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And that was the direction then it will go on the negative direction.

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This means that this is a AC current on AC current.

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Since it goes in both direction positive and negative.

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If it's only in the positive direction then it will be ADC.

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CONAN Let's look at some terms here.

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The point from here a to b is called One cycle.

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This is one cycle as you can see half of it in the negative direction and other having a positive direction.

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We can also call the one from zero to this point cycle or one cycle.

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This axis is the time axis and as you can see this is the distance traveled in one cycle which is called

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wave length.

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These are the basic concepts that you need to understand about AC and DC and current and voltage.

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They are very much the same and DC it will be a constant value in one direction while AC it will be

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a value that alternate between positive and negative direction.

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Thanks for watching.

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See your next lesson in which we will talk about circuits.