Question

please try to answer all the questions

Answer 1

upper level.....
parallel combination --- 1/8 + 1/16 + 1/16= 4ohm

series combination ----- 4 + 20= 24 ohm


Now at lower level.....

parallel combination --- 1/9 + 1/18 = 6 ohm

series combination --- 6+6=12ohm


FINALLY RESISTANCE ACROSS A & B = 1/24 + 1/12 = 8ohm

best
seldon

Answer 2

First we will go for upper part

Where R1=8 ohm

R2=16

R3=16

To find resistance in || let

1/Rp=1/16+1/16+1/8

=1+1+2/16=4/16

1/Rp=1/4

Where Rp=4 ohms

Now find Re in upper portion

Re=4+20=24ohm

Now come to lower section

Where R1=9 ohm

R2= 18 ohm

Now find Rp=1/9+1/18

=2+1/18=3/18

& 3/18=1/6

Rp=6 ohm

Now Re =6+6=12ohm

Now for whole cicircuit

Rp=1/24+1/12=1+2/24ohm

=3/24ohm & 1/Rp=1/8

& Rp=8 ohm and.