Help w physics questions

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I don't understand parallel resistor and series capacitor math...why is it harmonic Addition?

Oct 22nd, 2017

In parallel resistor 

because 

I =I1+I2

Because of Ohm's law

V/R= V/R1+V/R2

1/R =1/R1+1/R2

Series capacitor

1/C =V/Q= V1/Q+V2/Q= 1/C1+1/C2

Hence 1/C=1/C1+1/C2

Thus in these cases it is not arithmetic addition but harmonic addition (Vide harmonic mean)

Aug 21st, 2014

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Oct 22nd, 2017
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Oct 22nd, 2017
Oct 23rd, 2017
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