Question

Help me in this question.
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Answer 1

(a) minimum effective resistance(parallel)

    maximum effective resistance(series)

Answer 2

1)For maximum current

R=R1+R2+R3

=2+3+5

=10 ohm

2)For minimum current

1/R=1/r1+1/r2+1/r3

1/2+1/3+1/5

=15/30+5/30+6/30

=26/30

=13/15

=0.87