Question

Five resistances of resistance r are connected in the shape of letter a determine the total resistance

Answer 1

from fig resistance in ABC

Rs=2r

in circuit AC

1/Rp=1/r+1/r

1/Rp=2/r

Rp=r/2

now in circuit FG

Rs=r+r+r/2

Rs=5r/2

hope it helps you

Answer 2

The simplified diagram for resistance will be

So the total resistance of the circuit is

r=5+(3+7)×10(3+7)+10+5=15 Ω

The current through circuit is

I=1.515=0.1 A

Hope this information will clear your doubts about this topic.

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