A wire of resistance of20Ω is bent in the form of a closed circle. Whatis the effective resistance
between two points at the end of any diameter of the circle?
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As the wire is bent at its mid point, thus resistance of each semi-circle R=
2
10
=5Ω
Effective resistance between A and B R
eff
=5Ω∣∣5Ω
⟹ R
eff
=
5+5
5×5
=2.5Ω
solution
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