Question

Find the equivalent resistance between A and B.
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Answer 1

Answer:

The equivalent circuit is shown in figure.

Here, Req1=R+R=2R,Req2=R∣∣2R=R+2RR×2R=2R/3 and

Req3=R+2R/3=5R/3

Thus, RAB=R∣∣5R/3=R+5R/3R(5R/3)=85R