Calculate effective resistance b/w points A and B
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In (fig. 3.25)(a), 1Ωand2Ω
are in series and their resultant resistance is 3Ω. Now 3Ωand1.5Ω are in parallel and their equivalent resistance =3×1.53+1.5Ω=1Ω
In (Fig. 3.25)(b), resistance in the arm CD, i.e., r1=5Ω , resistance in the arm ADB, i.e., R2=5Ω. Now, R1,1ΩandR2 are in parallel.
If R is their equivalent resistance, 1R=1R1+11+1R2=15+11+15=75 or R=57Ω=0.71Ω.
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