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hello again I'm going to explain the last thing of the of the of the unit

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yeah that is how to calculate total capacity of a circuit okay it's it's not

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difficult this this part okay so let's go directly to an example so for instance

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we have this case we have two capacitors yeah in this way this way think thinking

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resistances and when we studied this before we said that this is a parallel

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or serious serious circuit yes it's a parallel circuit yeah yeah so in using

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resistances a do you remember the formula yeah

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over r1 plus 1 over r2 plus blah blah blah yeah nothing else yeah but using

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capacitors this goes in a different way but not in a in a in a difficult way

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because it's it works in the opposite way so we see a parallel circuit think

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in serious circuit using resistances so for instance if you have here 1 milli

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farad and here 2 milli farad the total capacity of the circuit is total capacity

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is let me call this c1 and this c2 yeah so the total capacity would be 1 milli

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farad plus 2 milli farads 3 milli farads and that's all okay and if we have more

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than two condensers capacitors connected like this okay like this we just need to

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add them okay the total capacity would be the summatory of each one okay do you understand

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this summatory if you don't understand forget this and think just in um and adding one by

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one okay okay so new one new one no I don't want yeah so it's a parallel what happens if we have

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this example one and another capacitor imagine two milli farads and four milli farad are they

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in parallel or is a serious secret yes serious secret okay serious secret so think in the opposite

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way when it's not like resistances now the total value is using the formula yeah but but we are

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going to use the we are going to be cheaters yeah so we are going to we are going to use the trick

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the trick remember total capacity is the division of what here we multiply the values and here we

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add the values it only function with two two capacitors if we have three we would need to add

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this and this and then this this and this now we need to do this formula the formula with two and

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then the result with the other one okay okay so we have two if we have the same units we can forget

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the units for a while and we type the units at the end to multiply by four here two four okay so this

28
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is 8 over 6 we can do this for this its value is 1.33333 as I said to decimals milli farads

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okay because we have milli farads here in both capacitors okay I'm not going to to put more than

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that so maybe three but not more than three imagine that here we have another capacitor of

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six milli farads so we would need to do this again but instead of two and four this value

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would be 1.33 and instead of four six yeah so just to finish one the last one and a mixed

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circuit no I don't want to see so something like that something like that okay it's a mixed circuit

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here we have two capacitors connected serially and together parallel okay so how do we solve this

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so path by path so first of all these two these two are connected serially sorry I forgot to type

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the value so maybe four milli farads four milli farads 10 9 9 8 8 8 milli farads and here for

37
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okay so first of all this we can call this one two and three okay so consider one two is four

38
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multiplied by 8 here 4 plus 8 so this is 32 over 12 we can divide this by 4 for 8 over 3 and it is

39
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2.67 67 watt milli farads okay always the same unit so we can type here milli farads okay and

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then this this condenser that is the same as this two it's connected parallel in parallel with the

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third one okay so total resistance is as we said that is in parallel we just need to add both c1 2

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plus c3 so if we are 2.67 and 4 milli farads we have 667 okay so just to finish and what I remember

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from now what I want you to know for the we are going to have an exam I'm going to tell you it in

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the post okay what I want you to know and what I want you to know to the exam and the exam will

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consist in a form in a form in Google okay and resistances for instance if I tell you we have a

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resistance with this next bunch orange brown blah blah blah tell me the value of the resistance

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symbols symbols of and diodes capacitors and resistances you know

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and potentiometer I told you also and exercises with diodes which

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which lamp lamps and this total total capacity more or less this is the and then I'm not going

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you to to memorize anything because you are going to you can check all the information in your notes

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it doesn't matter okay so that's all that's all okay see you stay at home see you ciao