NEET Questions Solved

PMT - 1997

In the arrangement of resistances shown below, the effective resistance between points A and B is

(1) 20 Ω

(2) 30 Ω

(3) 90 Ω

(4) 110 Ω

(1) By the concept of balanced Wheatstore bridge, the given circuit can be redrawn as follows

RAB=30×60(30+60)=20  Ω

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