Electrical Tutorial

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We have to find  V1 and V2 it by applying nodel analysis at two nodes  ?    Step 1: first nodel analysis         ( (V1-20) /5)  +(V1/10) +((V1-V2) /10) =0            (2V1-40+V1+V1-V2) /10 =0             4V1-V2=40.....................(I)          Now,                 Step 2:  second nodel analysis       ((V2-V1) /10) + (V2/20) -4=0  (2V2-2V1+V2-80)/20=0  3V2 -2V1=80 ......................... (II)               Now equate equation (I) and(II)  to get  the value of V1  and  V2             ( -2V1+3V2=80) *1             ( 4V1- V2  =40) *3              ..............................             ...

Electrical Tutorial 1)   Calculate the equivalent resistance (Req)?          Ans :  first R10 and R8 are in series             So,  R10 =2 ohm                     R8  = 10 ohm               R10+ R8 =(10 + 2 ) ohm = 12 ohm Now,  12 ohm and R9 are in parallel              R9=6 ohm So, Rparallel= (12*6) /(12+6) =4 ohm Now,  R7 and 4 ohm are in series                R7=8 ohm    Rseries =(4+8) ohm =12 ohm R6 and 12 ohm are in parallel                 R6=6 ohm Rparallel = (6*12)/(6+12) =4 ohm R5 and 4 ohm are in series            R5= 4 ohm  Rseries=(4+4) =8 ohm R4 and 8 ohm are in parallel            R4=8 ohm Rparallel ...