Questions
A uniform wire of resistance 36 ohm is bent in the form of a circle as shown in fig The effective resistance across the points A and B is
detailed solution
Correct option is A
Let r be the resistance of total length of circular wire' The resistance of smaller arc AB,r1=r/6=36/6=6Ω The resistance of bigger arcr2=5r/6=(5×36)/6=30Ω Resistances r1 and r2 are in parallel between points A and B, Therefore,1R=1r1+1r2=16+130=630=15∴R=5ΩTalk to our academic expert!
Similar Questions
Two resistances are joined in parallel whose resultant 6/5 ohm. One of the resistance wire is broken and the effective resistance becomes 2 ohm. Then the Resistance in ohm of the wire that got broken was
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